|Publication number||US3867718 A|
|Publication date||Feb 18, 1975|
|Filing date||May 30, 1972|
|Priority date||May 30, 1972|
|Publication number||US 3867718 A, US 3867718A, US-A-3867718, US3867718 A, US3867718A|
|Inventors||Moe Stephen S|
|Original Assignee||Moe Stephen S|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (7), Referenced by (85), Classifications (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent [191 1111 3,867,718 Moe [4 Feb. 18, 1975 [5 PORTABLE TRAFFIC CONTROL SYSTEM 3,406,403 10/1968 Spiteri 340/171 x M B 9 7 Inventor gg gggg 1253 2 5 5 Przmary Exammer.lohn W. Caldwell Assistant ExaminerWilliam M. Wannisky  Filed: May 30, 1972 Attorney, Agent, or Firm-Kolisch, Hartwell,  App! No; 257,797 D1ck1ns0n & Stuart  ABSTRACT [2?] 340/31 R, 340l8 gs43/l2fl2g A portable traffic control System for use-along a i 84 30 stretch of road where normal traffic movement must 1 0 171 343/225 be altered for one reason or another. The system includes a pair of remotely and independently radiocontrolled lamp-containing signal-display units which  References cued may be placed at opposite ends of the road stretch,
UNITED STATES PATENTS and controlled by an operator from a remote hand- 2,829,362 4/1958 Terril 340/84 X held transmitter. Optical systems are provided in these 1,161 6/1960 Scantlin units which enable the operator to monitor from the g back sides of the units the lighted conditions of the an we e a.. 3,159,817 12/1964 Hendricks et al 340/171 R lamps therem' 3,247,482 4/1966 Lesiter 340/171 R X 4 Claims, 3 Drawing Figures 1 PORTABLE TRAFFIC CONTROL SYSTEM BACKGROUND AND SUMMAARY OF THE INVENTION This invention pertains to a portable traffic control system. More particularly, it pertains to such a system which may be used along a stretch of road where, because of construction or some other reason, normal traffic movement must temporarily be altered.
As is well known, there are many situations where normal traffic flow must be modified somewhat along a stretch of road to accommodate construction work, or something else, which extends into the road. For example, there may be a stretch of road extending along a construction work zone where slow moving construction equipment may periodically enter for short periods of time. In such a situation, it may be desired to allow normal two-way traffic along the road stretch except at those times when equipment must enter the roadat which times traffic in both directions should temporarily be stopped. As another example, it is often the case that one of the lanes in a two-lane road must be blocked for an extended period of time, with alternate one-way traffic permitted along the other lane.
The present invention contemplates a novel portable traffic control system which may easily be set up for handling these and other similar circumstances for satisfactorily controlling traffic movement.
More specifically, the invention features a system comprising at least a pair of lamp-containing signaldisplay units which may be placed adjacent opposite ends of a road stretch where normal traffic movement must be altered. Radio-frequency remote control is employed in the system for controlling the lighted conditions of lamps in these units, with selective and independent control provided for the lamps in each of the units. With such selective and independent control provided, it is a simple matter for an operator of the system to adjust the lighted conditions of the lamps as desired to handle the particular traffic situation. In other words, the operator is provided a considerable amount of flexibility by the proposed system.
Another important feature of the invention is that means are provided in the signal-display units for indieating on the back sides thereof (i.e., those sides which face into a work zone), the particular lighted conditions then existing in the lamps in the units. With such a feature, it is a simple matter for an operator inside a work zone, i.e., between units, to know at all times exactly what the signal conditions are in the units. Such a feature is extremely important for reliable and safe control of traffic movement.
DESCRIPTION OF THE DRAWINGS These and other objects and advantages attained by the invention will become more fully apparent as the description which follows is read in conjunction with the accompanying drawings, wherein:
FIG. 1 is a simplified side elevation illustrating a system as contemplated herein set up for controlling traffic movement along a stretch of road;
FIG. 2 is an enlarged fragmentary cross-sectional view, taken generally along the line 2-2 in FIG. 1, illustrating details of construction in one of the signaldisplay units in the system of FIG. 1; and
FIG. 3. is a diagram illustrating a circuit employed in the system of FIG. 1.
Turning now to the drawings, and'referring first to FIG. 1, indicated generally at 10 is an elongated stretch of read which extends along a construction work zone 12, in which zone is employed a portable traffic control system 14 constructed according to the present invention. System 14 herein includes a pair of signal-display units 16, 18, and a signal-display actuating means including a pair of radio-frequency receivers 20, 22 and a radiofrequency transmitter, or remote control device, 24. Receivers 20, 22 are associated with units 16, 18, respectively. Units l6, 18 are supported on stands 26, 28, respectively, along road 10 adjacent opposite ends of zone 12. Transmitter 24 is a hand-held unit which, in FIG. 1 is held by an operator 30 located in zone 12 between the signal-display units.
Further describing the two signal-display units, which are substantially identical in construction, and considering FIGS. 1 and 2 together, unit 16 includes a housing 32 inside of which are suitably mounted three vertically spaced electrical lamps, or signal-display elements, 34, 36, 38. Mounted on the front side of housing 32 directly in front of lamps 34, 36, 38 are three front lenses, or optical systems, 40, 42, 44, respectively. Lens 40 is red, lens 42 amber, and lens 44 green. Suitably mounted inside housing 32, for each of the three lamps therein, are reflecting mirrors such as mirror 46 (see FIG. 2) provided for lamp 38. These three mirrors refleet light from lamps 34, 36, 38, through rear lenses 48, 50, 52, respectively, which are mounted on the. back side of housing 32. Lens 48 is red, lens 50 amber, and lens 52 green. Each such associated mirror-lens pair is referred to herein also as an optical system for its associated lamp. As can be seen clearly in FIG. 2, lenses 44, 52, which are associated with lamp 38, are constructed to project light therefrom outwardly in opposite directions from housing 32 along offset, nointersecting, substantially parallel and horizontal axes 55, 57, respectively. The reason for such an arrangement will be more fully explained later.
The optical systems just mentioned are also referred to herein as monitoring enabling means; and these optical systems, together with their associated lamps, constitute signal-display means.
As was mentioned earlier, unit 18 is substantially the same in construction as unit 16. Thus, unit 18 includes lamps 54, 56, 58 corresponding to lamps 34, 36, 38, re-
spectively; front lenses 60, 62, 64 corresponding to front lenses 40, 42, 44, respectively; and reaar lenses 66, 68, corresponding to rear lenses 48, 50, 52, respectively. As can be seen in FIG. 1, the signal-display units are positioned with their front lenses facing away from zone 12, and their rear lenses facing into the zone.
Provided for powering receivers 20, 22, and also the lamps in units 16, 18, are batteries 72, 74, respectively. A cable 76 extends to unit 16, and a similar cable 78 extends to unit 18.
The transmitter and receivers employed in system 14 are conventional radio-control devices which communicate by way of an amplitude-modulated radiofrequency wave. The particular transmitter employed herein is provided with two signaling buttons indicated at 24a, 24b. With the transmitter energized, on the operator operating button 24a, the carrier frequency of the transmitter is modulated at one preselected audio rate to which receiver 20 is tuned. Thus, operation of transmitter button 24a causes a control signal to be transmitted to receiver 20. Such a control signal, however, is not responded to by receiver 22 which is tuned to respond to another audio-modulating rate which results with operation of transmitter button 24b. As a consequence of this arrangement, it will be apparent that the radio-frequency communication system provided enables selective and independent transmission of control signals to the two receivers associated with the two signal-display units.
But for the fact that receivers 20, 22 are tuned, as just mentioned, to respond to different control signals coming from transmitter 24, the receivers are otherwise substantially identical in construction. In particular,
and referring now to FIG. 3, each receiver, such as receiver 20, includes an output terminal, such as terminal 200, on which a positive voltage pulse is produced on the receiver receiving and responding to a control signal from transmitter 24.
Explaining now further what is show in FIG. 3, indicated at 80, 82, 84 are three relays which are employed in conjunction with receiver and control unit 16. Relay 80 is a conventional stepping relay including a coil 80a, and three contacts 80b, 80c, 80d. Also included in this stepping relay is a rotary wiper 80e. Relay 82 is a conventional time-delay relay including a coil 82a, and a normally open contact 82b. On coil 82a being energized herein, a delay of about 6 seconds occurs before closure of contact 82b. Relay 84 includes a coil 84a and a normally open contact 84b.
The positive output terminal of battery 72 is connected to a conductor 86 which interconnects wiper 80a and the positive voltage supply terminal of receiver 20. The negative terminal of the battery is connected to a conductor 88 which extends both through cable 76 to one set of sides of lamps 34, 36, 38, and also to the negative supply terminal of receiver 20. Contacts 80b, 80c, 80d in relay 80 are connected through conductors 90, 92, 94, respectively, (which are contained in cable 76) to the other sides of lamps 34, 36, 38, respectively. One side of coil 80a in relay 80 is connected through a conductor 96 to one side of relay contact 84b. The other side of coil 80a is connected to a conductor 98 which interconnects conductor 86 and one side of relay contact 82b.
The lower end of coil 82a in FIG. 3 is connected to conductor 88 through a conductor 100, and the upper end of this coil in the Figure is connected through a conductor 102 to conductor 92.
The other side of relay contact 82b is connected through a conductor 104 to a conductor 106 which interconnects the upper end of relay coil 84a and output terminal 20a in receiver 20. A conductor 108 connects the lower end of coil 84a and conductor 88. A conductor 110 connects conductor 108 to the other side of relay contact 84b.
A circuit similar to that just described in FIG. 3 interconnects unit 18, receiver 22 and battery 74.
Explaining now how the systemdescribed herein may be used, and considering, for example, the controlling of signal displays presented by unit 16, let us refer for this purpose to FIG. 3 in the drawings. Under the circumstances illustrated in this figure, the coils in relays 80, 82, 84 are deenergized, and lamp 34 islit (i.e., is in a signaling state). As a consequence, beams of red light are projected from the lamp-forwardly through lens 40 and rearwardly through lens 48. This, of course,
signals traffic approaching zone 12 from the left in FIG. 1 to stop.
When it is desired to change this condition to indicate that traffic from this direction can move through the work zone, button 24a in transmitter 24 is operated to send a control signal to receiver 20. On this occurring, the receiver produces a shortduration positive voltage pulse on its output terminal 20a, which pulse momentarily energizes coil 84a. With energizing of this coil, contact 84b closes momentarily to energize coil a whereupon, wiper 80e moves out of contact with contact 80b, and into contact with contact 80d. On such a change occurring, lamp 34 turns off (i.e., is placed in a nonsignaling state), and lamp 38 turns on. With lighting of lamp 38, beams of green light are projected therefrom-forwardly through lens 44 and rearwardly through lens 52. This situation remains until further operation of transmitter button 24a.
When it is desired to return to a condition with lamp 34 lit, transmitter button 24a is again operated to send another control signal to receiver 20. Receiver 20 then again supplies a momentary positive voltage pulse to its output terminal which causes momentary energizing of coil 84a and closing of contact 84b. Such action again results in momentary energizing of relay coil 80a, which energizing results in movement of wiper 80e into contact with relay contact 800. With closure of wiper 802 and contact 800, lamp 36 lights, causing beams of amber light to be projected from the lamp forwardly through lens 42 and rearwardly through lens 50.
In addition, relay coil 82a becomes energized, and
about 6 seconds later, as mentioned earlier, closes its associated contact 82b. With closure of contact 82b, positive voltage from battery 72 is supplied to energize coil 84a, whereupon contact 84b again closes. And, such action results in relay coil 80a again energizing, with the result that wiper 802 closes upon contact with 80b. Thus, lamp 36 turns off, and lamp 34 again lights up.
It will thus be apparent that successive operations of transmitter button 24a result, in one instance, in unit 16 changing from a condition displaying a red light to a condition displaying a green light, and in the next instance from a condition displaying a green light, through a condition temporarily displaying an amber light, and finally to a condition again displaying a red light. Such operation results without any change necessarily occurring in the lighted conditions of lamps in display unit 18.
Similar operation is, of course, producible with respect to the lamps in display unit 18 with successive operations of transmitter button 24b.
It will be apparent, therefore, that only a single operator is required to control the operations of the signal display units. This operator may be one who is located in the work zone, and who may perform therein tasks other than simply operating transmitter 24.
Because of the fact that the lighted conditions of the lamps inside the display units are monitorable from the rear sides of the units, i.e., within the work zone between them, an operator in the zone will always be able to tell exactly what the lighted condition of each display unit is.
With the lenses provided for each lamp in a display unit axially offset, and constructed to project light beams along offset nonintersecting axes, spurious light transmission directly from one lens to another is not possible. Such transmission is, of course, undesirable, since it might result in a confusing indication as to the lighted condition in a display unit.
lt should be noted that while a particular system has been described herein as having a particular arrangement of lamps and lenses, and as using only two signaldisplay units, modifications are possible. For example, there might be applications where a flashing amber light might be desired instead of a steady green light. Also, there might be situations where more than two independent signal-display units are wanted.
Thus, while an embodiment of the invention has been described herein, it is appreciated that various modifications may be made within the scope of the invention to take care of particular situations.
It is claimed and desired to secure by letters Patent:
1. A portable traffic control system comprising a pair of portable signal-display units adapted to be placed for use at spaced-apart points, each of said units including a signal-display element observable from one side of the unit and placeable selectively in signaling and nonsignaling states and means enabling monitoring of the states of said element simultaneously from the opposite side of the unit, and
signal-display actuating means including a portable remote control device operatively coupled to each of said signal-display elements of said units, said signal-display actuating means employing radiofrequency communication and comprising a radiofrequency receiver for each signal-display unit, said remote control device comprising a radiofrequency transmitter including a pair of independently actuatable means actuatable to effect communication by said transmitter from a remote location selectively and exclusively with a different one of said receivers independently of communication with the other receiver, such independent communication capability enabling the establishment from such a remote location of a plurality of different selected traffic movement conditions in the region between said units.
2. The system of claim 1, wherein each signal-display element comprises a lamp, and the means enabling monitoring of the state thereof comprises an optical system disposed adjacent said lamp for directing light produced thereby outwardly away from said opposite side of the signal-display unit containing the lamp.
3. The traffic control system of claim 1 wherein the signal-display element comprises a lamp, a signaldisplay unit includes a lens through which said lamp is observable on said one side of the unit, and the means enabling monitoring of the state of the signal-display element comprises another lens on said opposite side of the unit laaterally offset from said first-mentioned lens.
4. A portable traffic control system for controlling traffic movement in a zone comprising a pair of portable signal-display units, each having a front and a back side, and each including a signaldisplay element placeable selectively in signaling and nonsignaling states, with the state of such element at any given time being observable simultaneously from both of said sides,
said units being adapted to be placed for use at spacedapart points in said zone, with said front sides facing outwardly of the zone, and said back sides facing into the zone, and
signal-display actuating means comprising a radiofrequency receiver for each signal-display unit, and a remote control device for the receivers of the two units comprising a radio-frequency transmitter, said radio-frequency transmitter including a first actuating means actuatable to place the transmitter in one selectively controlled transmitting state for communicating selectively and exclusively with one of said receivers independently of the other, and a second actuating means actuatable independently of said first actuating means to place the transmitter in another selectively controlled transmitting state for communicating with the other receiver independently of said one receiver, such independent communication capability enabling the establishment from the location of said transmitter of a plurality of different selected traffic movement conditions in said zone.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US2829362 *||May 3, 1954||Apr 1, 1958||Frank Terrill||Traffic control system|
|US2941161 *||May 26, 1954||Jun 14, 1960||Gen Dynamics Corp||Broadcast paging system|
|US2941185 *||May 21, 1957||Jun 14, 1960||Mullikin Wilbur J||Portable traffic signal|
|US3046521 *||Apr 12, 1960||Jul 24, 1962||Cantwell Edward G||Portable traffic signal system|
|US3159817 *||Sep 14, 1959||Dec 1, 1964||Bliss E W Co||Traffic signal control toner sequencer and responder|
|US3247482 *||May 26, 1961||Apr 19, 1966||Rad O Lite Inc||Traffic control systems|
|US3406403 *||Nov 27, 1964||Oct 15, 1968||Spiteri Joseph||Variable frequency oscillator|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3938080 *||Jun 3, 1974||Feb 10, 1976||Kurt W. Thurston||System for the programmed flashing of warning lights|
|US4535331 *||Sep 19, 1983||Aug 13, 1985||Koenig Kurt L||Portable traffic warning light|
|US4857921 *||May 30, 1986||Aug 15, 1989||Flagman, Inc.||Digital traffic control system|
|US5422638 *||Feb 24, 1994||Jun 6, 1995||Quintech, Inc.||Stand for a remotely operated road sign|
|US5469157 *||Feb 10, 1994||Nov 21, 1995||Cbd, Inc.||Barricade light with light emitting diode|
|US5682150 *||Oct 3, 1996||Oct 28, 1997||Votava; Robert Bob||Remote control train warning apparatus|
|US5784006 *||Jul 5, 1996||Jul 21, 1998||Hochstein; Peter A.||Annunciator system with mobile receivers|
|US5900826 *||Nov 27, 1996||May 4, 1999||Farber; Gary J.||Remote controlled portable traffic signals|
|US5929787 *||Nov 27, 1996||Jul 27, 1999||Mee; Gary L.||Vibration actuated traffic light control system|
|US5959554 *||Jul 18, 1996||Sep 28, 1999||Charles Vincent Armstrong||Traffic control device|
|US6147623 *||Aug 20, 1999||Nov 14, 2000||Rippen; Craig R.||Smart cross programmable vehicle and pedestrian signage with electronic display and infrared remote control|
|US6788217 *||Sep 30, 2002||Sep 7, 2004||911Ep, Inc.||LED warning signal light and light support having at least one sector|
|US6930615||Sep 23, 2002||Aug 16, 2005||911Ep, Inc.||LED warning signal light and light support|
|US6989743||Aug 29, 2003||Jan 24, 2006||911Ep, Inc.||Replacement LED lamp assembly and modulated power intensity for light source|
|US6995681||Jun 27, 2003||Feb 7, 2006||911Ep, Inc.||LED warning signal light and movable support|
|US7033036||Oct 28, 2004||Apr 25, 2006||911Ep, Inc.||LED light bar|
|US7038593||Dec 31, 2003||May 2, 2006||911Ep, Inc.||Strip LED light assembly for motor vehicle|
|US7046160||Apr 11, 2005||May 16, 2006||Pederson John C||LED warning light and communication system|
|US7064674||Dec 29, 2003||Jun 20, 2006||911Ep, Inc.||Replaceable LED modules|
|US7080930||Sep 13, 2004||Jul 25, 2006||911Ep, Inc.||LED warning signal light and row of LED's|
|US7095334||Dec 31, 2003||Aug 22, 2006||911Ep, Inc.||Strip LED light assembly for motor vehicle|
|US7153013||Aug 13, 2003||Dec 26, 2006||911Ep, Inc.||LED warning signal light and moveable row of LED's|
|US7394398||Sep 1, 2004||Jul 1, 2008||911Ep, Inc.||LED warning signal light and light support having at least one sector|
|US7498933||Jun 20, 2006||Mar 3, 2009||911Ep, Inc.||Replaceable LED modules|
|US7561036||Nov 16, 2004||Jul 14, 2009||911 Emergency Products, Inc.||LED warning signal light and light bar|
|US7586421||Nov 15, 2006||Sep 8, 2009||Emergency Traffic Systems, Inc.||Traffic signal devices and methods of using the same|
|US7902978||Oct 20, 2008||Mar 8, 2011||John C. Pederson||Intelligent observation and identification database system|
|US7973676 *||Jul 5, 2011||Mohammad Meshkin||Assembly and method for controlling road signal indicators|
|US8188861||May 29, 2012||John C. Pederson||Intelligent observation and identification database system|
|US8188878||May 29, 2012||Federal Law Enforcement Development Services, Inc.||LED light communication system|
|US8188879||May 23, 2008||May 29, 2012||Federal Law Enforcement Development Services, Inc.||LED light global positioning and routing communication system|
|US8242933||Aug 14, 2012||Ibis Tek, Llc||Wireless traffic light controller|
|US8330599||Dec 11, 2012||John C. Pederson||Intelligent observation and identification database system|
|US8331790||Mar 22, 2012||Dec 11, 2012||Federal Law Enforcement Development Services, Inc.||LED light interior room and building communication system|
|US8362923||Jan 29, 2013||Emergency Traffic Systems Inc.||Traffic signal devices and methods of using the same|
|US8543505||Jan 13, 2012||Sep 24, 2013||Federal Law Enforcement Development Services, Inc.||Method of providing lumens and tracking of lumen consumption|
|US8571411||Mar 22, 2012||Oct 29, 2013||Federal Law Enforcement Development Services, Inc.||LED light broad band over power line communication system|
|US8593299||May 24, 2012||Nov 26, 2013||Federal Law Enforcement Development Services, Inc.||LED light global positioning and routing communication system|
|US8687965||May 23, 2008||Apr 1, 2014||Federal Law Enforcement Development Services, Inc.||LED light dongle communication system|
|US8744267||Mar 22, 2012||Jun 3, 2014||Federal Law Enforcement Development Services, Inc.||Building illumination apparatus with integrated communications, security and energy management|
|US8751390||Aug 21, 2013||Jun 10, 2014||Federal Law Enforcement Development Services, Inc.||Method of providing lumens and tracking of lumen consumption|
|US8886045||Oct 10, 2013||Nov 11, 2014||Federal Law Enforcement Development Services, Inc.||LED light broad band over power line communication system|
|US8890655||Sep 20, 2013||Nov 18, 2014||Federal Law Enforcement Development Services, Inc.||Intelligent observation and identification database system|
|US8890773||Mar 31, 2010||Nov 18, 2014||Federal Law Enforcement Development Services, Inc.||Visible light transceiver glasses|
|US8902076||May 24, 2012||Dec 2, 2014||Federal Law Enforcement Development Services, Inc.||LED light communication system|
|US9100124||Mar 13, 2014||Aug 4, 2015||Federal Law Enforcement Development Services, Inc.||LED Light Fixture|
|US9111445||Mar 15, 2013||Aug 18, 2015||Nicholas Pashel||Wireless traffic lights synchronizer|
|US9246594||Mar 27, 2014||Jan 26, 2016||Federal Law Enforcement Development Services, Inc.||LED light dongle communication system|
|US9252883||Oct 10, 2013||Feb 2, 2016||Federal Law Enforcement Development Services, Inc.||LED light global positioning and routing communication system|
|US9258864||Mar 13, 2014||Feb 9, 2016||Federal Law Enforcement Development Services, Inc.||LED light control and management system|
|US9265112||Mar 13, 2014||Feb 16, 2016||Federal Law Enforcement Development Services, Inc.||LED light control and management system|
|US9294198||Mar 13, 2014||Mar 22, 2016||Federal Law Enforcement Development Services, Inc.||Pulsed light communication key|
|US9318009||Nov 18, 2014||Apr 19, 2016||Federal Law Enforcement Development Services, Inc.||Intelligent observation and identification database system|
|US9363018||Dec 6, 2012||Jun 7, 2016||Federal Law Enforcement Development Services, Inc.||LED light interior room and building communication system|
|US20040032745 *||Mar 26, 2003||Feb 19, 2004||Pederson John C.||LED alley/take-down light|
|US20040066306 *||Aug 29, 2003||Apr 8, 2004||Pederson John C.||Replacement LED lamp assembly and modulated power intensity for light source|
|US20040085219 *||Jun 27, 2003||May 6, 2004||911Ep, Inc., Jacksonville Beach, Fl||LED warning signal light and movable support|
|US20040145490 *||Dec 29, 2003||Jul 29, 2004||Pederson John C.||Replaceable LED modules|
|US20040156210 *||Dec 31, 2003||Aug 12, 2004||911Ep, Inc.||Strip LED light assembly for motor vehicle|
|US20040160334 *||Dec 31, 2003||Aug 19, 2004||Pederson John C.||Strip LED light assembly for motor vehicle|
|US20040197968 *||Aug 22, 2003||Oct 7, 2004||Chia-Tien Peng||[low temperature polysilicon thin film transistor and method of forming polysilicon layer of same]|
|US20050036334 *||Sep 13, 2004||Feb 17, 2005||Pederson John C.||LED warning signal light and row of LED's|
|US20050040965 *||Sep 1, 2004||Feb 24, 2005||Pederson John C.||LED warning signal light and light support having at least one sector|
|US20050047167 *||Oct 17, 2003||Mar 3, 2005||Pederson John C.||Warning signal light bar|
|US20050057941 *||Jul 23, 2003||Mar 17, 2005||911Ep, Inc.||360 Degree pod warning light signal|
|US20050099317 *||Oct 28, 2004||May 12, 2005||Pederson John C.||Led light bar|
|US20050231381 *||Apr 11, 2005||Oct 20, 2005||Pederson John C||Led warning light and communication system|
|US20050264428 *||Jul 15, 2005||Dec 1, 2005||911Ep, Inc.||LED warning signal light and light supports|
|US20060181879 *||Apr 5, 2006||Aug 17, 2006||911Ep, Inc.||Rotational LED reflector|
|US20070115139 *||Nov 15, 2006||May 24, 2007||Emergency Traffic Systems, Inc.||Traffic signal devices and methods of using the same|
|US20070126598 *||Nov 18, 2004||Jun 7, 2007||Brent Carter||Portable boom gate apparatus|
|US20080136661 *||Feb 18, 2008||Jun 12, 2008||Federal Law Enforcement Development Service, Inc.||Led warning light and communication system|
|US20080292320 *||May 23, 2008||Nov 27, 2008||Federal Law Enforcement Development Service, Inc.||Led light global positioning and routing communication system|
|US20080303695 *||Jun 6, 2007||Dec 11, 2008||Mohammad Meshkin||Assembly & method for controlling road signal indicators|
|US20080310850 *||May 23, 2008||Dec 18, 2008||Federal Law Enforcement Development Services, Inc.||Led light communication system|
|US20080317475 *||May 23, 2008||Dec 25, 2008||Federal Law Enforcement Development Services, Inc.||Led light interior room and building communication system|
|US20090003832 *||May 23, 2008||Jan 1, 2009||Federal Law Enforcement Development Services, Inc.||Led light broad band over power line communication system|
|US20090021389 *||Jul 18, 2007||Jan 22, 2009||Robert Nelson Entrup||Traffic Control Apparatus|
|US20090072972 *||Oct 20, 2008||Mar 19, 2009||Pederson John C||Intelligent observation and identification database system|
|US20090129782 *||May 23, 2008||May 21, 2009||Federal Law Enforcement Development Service, Inc.||Building illumination apparatus with integrated communications, security and energy management|
|US20100026520 *||Feb 4, 2010||Emergency Traffic Systems, Inc.||Traffic signal devices and methods of using the same|
|US20110012757 *||Jul 18, 2009||Jan 20, 2011||Nicholas Pashel||Wireless traffic light controller|
|US20110157369 *||Jun 30, 2011||Pederson John C||Intelligent Observation And Identification Database System|
|US20150042492 *||Aug 6, 2013||Feb 12, 2015||Eugene F. Heacock||Traffic Control|
|WO1995020206A1 *||Jan 18, 1995||Jul 27, 1995||Armstrong Charles V||Traffic control device|
|International Classification||G08G1/095, G08G1/0955|