Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2379006 A
Publication typeGrant
Publication dateJun 26, 1945
Filing dateAug 30, 1943
Priority dateAug 30, 1943
Publication numberUS 2379006 A, US 2379006A, US-A-2379006, US2379006 A, US2379006A
InventorsJohnson Theodore L
Original AssigneeJohnson Theodore L
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Construction of striking implements
US 2379006 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

June 26, 1945. T. L. JOHNSON v2,379,006



Application August 30, 1943, Serial No. 500,723

8 Claims.

This invention relates to improvements in construction of striking implements, and more particularly to improved materials and an improved relation of elements going to make up various articles for manual usage in swinging or impact service.

Among the numerous applications may be noted baseball bats, cricket bats, .billiard cues, golf club shafts, handles for various manual implements and tools, and similar elongate articles. 'I'he foregoing list of possible usages of the present improvements is not intended as exhaustive, but merely to exemplify the manifold possibilities of utilization. However, for purposes of brevity the description will be conned to construction of a presently preferred form of baseball bat.

Various attempts have heretofore been made to manufacture baseball bats and the like, of composite construction. It is known, for example, to provide a bat with a core or the like of metal tubing for purposes of adding strength. It is known to employ a variety of materials in the construction of implements of this general nature. However, so far as advised, all of such earlier proposed constructions have failed of general adoption, for various reasons of inadequate balance, service characteristics, flexibility, appearance, diculty or high costs of manufacture, and other reasons. l

The one-piece baseball .bats formed of wood and in general usage in regulation baseball, are subject to a number of shortcomings, among which may be noted the eifects of wood grain, often resulting in zones of weakness in the bat, sometimes also affecting the balance of the implement, and alwayssubject to the uncertainties of hidden defects which frequently result in splitting or breakage. It is accordingly a major general ob- .lective of the invention to overcome each and all of the defects as now existing in conventional regulation baseball bats and like implements.

A further object of the present invention is to couple the advantages above noted, with facilities for adjusting the axial balance of the bat or other shaft, individually to the preference of the user, this being possible without the requirement of any special skill or tools for the purpose.

Yet another object of the invention is attained in a bat, shaft, or similar implement of substantially split-proof construction; one which is, for practical purposes, of homogeneous construction and sectional makeup, and which, being built up from and upon a core portion will notexhibit any of the usual weaknesses due to internal defects.

. which:

Yet another object of importance is'attainedin a construction of shaft for a sporting implement or manual tool, which, although of fabricated.

construction and great strength, nevertheless will approximate in finish, a surface which is close in appearance and reactive effect to these characteristics of natural wood, whereby, upon attaining general usage, the article will to a minimum extent if at all, disturb the accepted performance and appearance characteristics of the olderk one-piece wooden articles.

The foregoing and still further objects will more clearly appear from the following detailed description of a preferred construction of baseball bat, particularly when considered in connection with the accompanying drawing Fig. 1 is an elevation of a baseball bat constructed in accordance with present improvements, a fragmentary portion ofthe striking zone thereof being broken away to show in section certain features of internal arrangement;

Fig. 2 is a transverse sectional elevation er1-- larged to substantially full scale, this section bef ing taken along line 2 2 of Fig. 1, and

Fig. 3 is a longitudinal sectional view substantially on a full scale, of the outer end portion of a baseball batbuilt according to present improvements.

Although articles within the intended scope of the appended claims may be produced by a number of processes, or Aby variations in steps of the single example given, it is thought to conduce to a better understanding of the nature of the elements going to make up the selected structural example, and the relation of these elements, to suggest certain steps of a preferred method of building a baseball bat; accordingly, although the structure is stressed and claimed, description of structurev is hereinafter correlated, in a degree, with method steps. y f

Referring now by characters of reference to the drawing, it is greatly preferred, although not strictly essential, that the shaft-like body of the article be formed by winding its outer elements on a starting mandrel or core portion; this is indicated generally at I and extends by preference but not necessarily, through the full length of the bat or other shaft, and in order to facilitate production in case of a wound body structure, the tube l0 is reduced somewhat in diameter toward and through the handle portion of the bat, as indicated at Il. Y

The tube I0 is preferably formed of a relatively rigid metal stock, seamless in nature, and is prothereof, in

vided for a purpose to appear with internally threaded end portions indicated at I2 at the outer end, and at I3 at the handle end. Into each of these threaded portions fits a threaded plug I4 at the outer end, and a. similar closure I5 at the handle end. These closures may be transversely kerfed as at I6 (Fig. 3) or provided with spaced spanner sockets to facilitate insertion and removal as desired. Besides the function of tube I0 as a core portion or mandrel in formation and the shaft or bat, aswell as an axial reinforcement, the bore of the tube I0 may also readily serve the purpose of a receiver for balancing in.

serts. These may be of lead or other metal and are indicated generally at I1, being of any suitable or individually desired length and intervened by or cushioned endwise with inserts 20 of corkv or the like, the latter being alsoiof suitable or individually desired lengths and number.

It will now have become obvious that by varyingthe location of the balancing weight elements I1 in the bore of tube I0, and maintaining their selected position by the proper number and location of the cork elements, which like the weight elements rather snugly rit the bore, any desired individual balance ofitheibat may be attained. It is realized that, of itself, similar provisionsfor balancing elongate articles have heretofore been made, hence no claim is made for this feature apart from the present combination. Some balancing provision is, however, particularly desired for effecting complete individualization4 of the article.

Outwardly of the core identified with tube I0, the body of the shaft, bat or the like is built up by winding over and around the core, a series of relatively narrow strips of wood veneer,` each preferably of minimum thickness. While itwill now have appeared as obvious to wrap the individual strips of veneer 2| in a direction at a right angle totheaxis of l the tube I0, it is preferred as makingfor greater strength, and to eliminate completely any effects of grain in the veneer, to lay up the wound servings of veneer in a directionv somewhat biased to a normal relation, as will clearly appear from the dotted` lines demarking the outer turns or servings of the veneer, in Fig. l.

It is of course contemplated that the Wrapping of the individual servings will be effected by power equipment, and for this purpose, temporary journalling Vand supporting trunnions or-pins (not shown) may be threaded into each end of the tube I0, say into the threaded seats I2, throughA whichlthe core ID may be power-rotated andthe strips of veneer 2I fed to the rotating tube or mandrel, from suitable supply rolls thereof. Continuity of feed mayreadily and conveniently be maintained by securing together the finishing and beginning'ends of the veneer strip, as by a thermoplastic or other bonding material which may besimilar to that hereinafter referred to, and which may be utilized for this purpose either in the form of a liquid or a thin film. It may also be notedl as entirely feasible to derive the taper of the shaft, as in a baseball bat,by directing -a feedof relatively thinner strip veneer onto the handle portion of the implement, andthe relatively heavier gauge material onto the striking portion of the nishedarticle, whereby there results substantially or exactly, the desired taper, as well as initial balance and shaping of the article. v

Itis a further preferencein the construction of a baseball bat to provide for a feed,automatic or manual, of a supply of a preferably thermosetting synthetic resin such as frequently used in plywood practice, onto or between the adjacent surfaces of the continuously wound plies or layers of the bat. The thermo-setting material is fed at such a rate .and in suflicient amounts so as to provide intervening layers, between the adjacent wound strips of veneer, as indicated at 22, and in such further amounts and locations that the plastic will occupy, but not substantially extend from the spaces indicated at 23, edgewise vof the adjacent continuous strips.

It is als'o a preference in building up the body of the shaft, as described, from wound strips or layers of wood veneer, to leave the outer serving of veneer free of the plastic, at least free of any added plastic material, except in the very minute lines of edgewise juncture of the several strips, as in the zone 24 (Fig. 1) ,and possibly also excepting the end zones of the structure, as later described.

As a convenient expedient in starting the winding operation of the veneer stripl over themandrel I0, the latter may be provided with angularlyiand axiallyspaced slots, or with tongues or the like (not shown) of just a width to lreceive the start-v ing end` portions of the veneer strip. This or a similar provision is particularly advisable since it is a preference in winding the veneer `onto the mandrel or core I0, to maintain it under Yan appreciable tension, whereby to assure against wrinkling or warping effects, and to obviate any misshapement which might otherwise appear from ballooning portions in the startinglor intermediate layers as wound.

At the finish end of each servingof veneer strip, depending upon the thickness of. veneer employed, it may sometimes be advisable or desirable to feather or taper the marginf'of` the strip, and to secure `such strip byan' added localized coating of a thermosetting or other plastic. This requirement may, however, be obviated'by a winding practice such that the finishingends of the strips will fall within an outer end zone25, or in an end zone 26, the latter constituting as will appear, vpart of the handle portion of the bat. The foregoing suggestion is made vin view of a further preferencev of providing each of the end zones 25 and 25 with an overlayer of a plastic material similar to or at least chemically compatible with the bonding layer'221between 'the wrappings, servings orplies of the body or shaft.` These overlayers extend preferably fully about the circumference of each end of the implement, and as will now readily appear, serve each as a protecting and securing sleeve'over the finishing ends of the wound strip of veneer. The overlayer 25 will serve a further valuable purpose in that it covers over and assists in producing the desired conformity around the otherwise exposed ends of the veneer strips in this zone. The plastic overlayer 25 thus forms in eifect a protecting cap over the outer end of the bat.

At the inner or handled end of the implement, the overlay26 will serve similarly to the overlay 25, the several noted purposes, but in this zone a somewhat increased amountv of the plastic is added, particularly atthe extreme end of the bat,

4 so as to form the collar or knob-like protuberance 30 resembling that provided on conventional baseball bats.

As an optional, and in many respects equally preferable practice, 4in forming up the body of the shaft, the veneer strips 2I may consist not of plastic material. With this practice it may not be necessary to add in a separate operation, the resin or other plastic material to cement the several layers together. However, a thermo-setting plastic being preferred, it is a present preference after the veneer strips are wound as described about the tube l and the overlayers 25 and 26 built into place, to place the now formed but as yet uncompleted article in a suitable mold or otherwise to confine it under conditions of suitable temperature and pressure for effecting a setting of the plastic, either by polymerization as is contemplated in present production, or by evaporation of solvent or other effect according to nature of the plastic materialsemployed.

The described curing operation in a pressure mold, assuming a phenol-formaldehyde resin to be employed as a thermosetting plastic, may, for example, be carried out in a steam-heated hydraulic press at a temperature selected for optimum results, say in a range of 280-300 degrees F. and at a pressure. of 2100 lbs., ten to fifteen minutes press treatment being usually sufcient to cure the plastic intervening or impregnating the several strip layers 22, as well as that forming the overlays and 26. Upon removal from the press after completion of the cure, it will now appear that the article will consist of whatmay be considered essentially an integra1 or unitary article, all parts of which in comparable section are of close to uniform strength, free of internal defects, closely similar in appearance and weight, to conventional baseball bats for example, and susceptible with the balancing provisions mentioned, vof being custom-balanced to meet the individual desires of the user.

Complete individualizaticn of the bat or other article, as to contouring and balance may be effected by building the article somewhat oversize in any zone, or over its entire length if desired. The oversize portions may be reduced by sanding or otherwise abrading to result in any exact contour desired. This may be done with the aid of an article formerly used by the individual, or by a developed template or other pattern, in numerous ways`which will now readily suggest themselves.

It will now have become obvious that quite the same principles described in the construction of baseball bats may equally well and with marked advantage be utilized in manufacture of other shafts in swinging or striking implements; for example, there exists by virtue or" the present improvements a noteworthy facility for varying flexibility, as in a golf club shaft, by variation of nature, width, thickness and tension of initial application of the wound strips, as well as by variation of the bonding plastic materials. The same advantages prevail in the manufacture of numerous other manually utilized implements for various sporting and utilitarian purposes.

It will now have become obvious that the present improvements lead themselves to a wide variation in both choice and nature of materials to be utilized with and bonded by the selected plastic such as the thermosetting material described. It is in fact contemplated that, instead of distinct strips' of veneer, shaft elements may be formed up of strips or masses of other materials Wound on or otherwise applied to a starting core and bonded in position, possibly also with the final shape of the article determined and perfected by molding under pressure.

Although the invention has been described by making specic reference to a selected construction of baseball bat, the detail of description is to be understood solely in an instructive and not in any limiting sense,many variations being possible within the scope of the claims hereunto appended.

I claim as my invention:v f

1. A shaft for use as a striking implement or the like, formed of a plurality of spirally-arranged laminations of a wood veneer, layers of a plastic bonding material intervening at least certain of the laminations, and a cap of a similar plastic material, molded over a handle forming end of the implement, and projecting endwise beyond the wood veneer, the cap being enlarged to form an annular collar, and extending inwardly along the shaft suiliciently to icover and secure the end margin of the outermost serving of veneer.

2. In a striking implement for manual use, an elongate body including a tubular core and a plurality of laminations of wood arranged in wound relation over and about the core, a body of a polymerized plastic resin coextensive with each of said laminations and serving to bond the laminations into an integral or unitary structure, and a body of a similar resin at each end of the implement, molded on and bonded to the edges of the wound laminations otherwise exposed at the ends of the implement.

3. In a baseball bat or similar implement, an elongate tapered body consisting of a plurality of spirally wrapped wood laminations, layers of ther- ,mosetting synthetic resin adjacent each of and Vconstituting a bond between said layers, and a molded cap of the resin, overlying each end of the implement, one of said caps `constituting a securement for an end of the outermost lamination.

4. A baseball bat or the like, comprising a shaft built up at least in part of a convolute series of laminations of strip veneer impregnated with a resin, polymerized in the convolute laminations as laid up to form the shaft, the outer serving of veneer strip being continuous over the length of the shaft and terminating in the handle portion of the implement, and a collar and cap structure at the handle end of the shaft, overlying the end of the outer serving 4of strip, being molded to provide the collar, and formed of a resin comparable, in polymerizing characteristics, with that in the veneer laminations.

5. A shaft or body for use as a sporting implement or the like, the shaft being formed of laminations of veneer wound about the axis of the shaft and bonded by a setting plastic material, the shaft having certain portions covered by plastic overlays, which extend over otherwise exposed end portions of the veneer, the overlays being of rounded Icontouring in part, serving to conceal and protect the otherwise exposed edges of the veneer against spalling eifects.

6. A body or shaft for a striking implement or the like, constructed of strips of veneer wound in biased relation about the axis of the shaft, the outer end of the wound veneer strip being brought to lie in the region of a handle portion of the shaft or implement, and the latter provided with a resin overlay, in the region of and serving as a protection for said outer end of the veneer strip.

7. A baseball bat or similar implement of tapered section, formed of wound strips of wood veneer in wrapped relation about the longitudinal axis of the bat and including amounts of a thermosetting plastic material arranged to bond the faces and adjacent edge portions of the superposed wrapped strip portions of the veneer, the outer surface of the striking portion of the bat or the like, including a `core element, strip ma- 10 terialsoverlying Athe core element `in bias-.Wound relation thereto, and impregnated with a thermosetting'plas'tic polymerized in situ about the core and betweenlayers of the strip, and anend cap of the polymerized plastic, which with the wound strip and` adjacent plastid-determines and xes. .the configuration, shaping, and dimensions of the implement.


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2494351 *Dec 17, 1947Jan 10, 1950Montero Modesto PFiber-reinforced bowling pin
US2584133 *Mar 26, 1945Feb 5, 1952Chris T KoochembereInsert fastener
US2592013 *Jul 7, 1950Apr 8, 1952Curley Thomas FGolf club
US2797923 *Feb 3, 1955Jul 2, 1957Dettman Fred CBowling pin
US3099449 *May 15, 1961Jul 30, 1963Gamble Brothers IncWooden bowling pins of spherical belly type and prefabricated segments therefor
US3729196 *Oct 1, 1970Apr 24, 1973Worth Bat Co IncMetal bat
US3830496 *Sep 6, 1973Aug 20, 1974Amf CorpBat
US3877698 *Nov 28, 1973Apr 15, 1975Volpe Michael ABaseball bat with replaceable ball-striking portion
US3888283 *Sep 7, 1973Jun 10, 1975Cauffiel Ford BTapered pole made of variable width metal strips
US3955816 *Mar 11, 1974May 11, 1976Bratt Leonard RWarm-up bat
US3972528 *Feb 14, 1975Aug 3, 1976Pepsico Inc.Baseball bat grip
US4032143 *Sep 29, 1975Jun 28, 1977Desoto, Inc.Composite baseball bat
US4671508 *Feb 6, 1986Jun 9, 1987Tetreault Albert GPractice bat
US4898386 *Feb 10, 1989Feb 6, 1990Anderson Donald ATraining bat
US5114144 *May 4, 1990May 19, 1992The Baum Research & Development Company, Inc.Composite baseball bat
US5165686 *Dec 18, 1990Nov 24, 1992Morgan Edward HWooden baseball bat
US5180163 *Dec 27, 1991Jan 19, 1993Lanctot Paul ABaseball bat
US5290030 *Jun 5, 1992Mar 1, 1994Mgx, Inc.Cue stick
US5460369 *Oct 15, 1993Oct 24, 1995The Baum Research & Development Company, Inc.Composite baseball bat
US5501450 *Aug 26, 1994Mar 26, 1996Nolan; Timothy J.Weight for baseball bat and method of manufacture
US5511777 *Feb 3, 1994Apr 30, 1996Grover Products Co.Ball bat with rebound core
US5624115 *Aug 25, 1995Apr 29, 1997The Baum Research & Development Co., Inc.Composite baseball bat with cavitied core
US5899823 *Aug 27, 1997May 4, 1999Demarini Sports, Inc.Ball bat with insert
US6042493 *May 14, 1998Mar 28, 2000Jas. D. Easton, Inc.Tubular metal bat internally reinforced with fiber and metallic composite
US6113501 *Apr 29, 1998Sep 5, 2000Richards; James M.Billiard cue stick accessory
US6152840 *Sep 3, 1999Nov 28, 2000Baum; Charles S.Composite baseball bat with cavitied core
US6254502 *Jul 11, 1996Jul 3, 2001Sport Fun, Inc.Weighting system for sports balls and hitting implements
US6302813Oct 1, 1998Oct 16, 2001Mark J. SturgeonNoise making novelty baseball bat
US6443860 *Aug 11, 2000Sep 3, 2002American Trim, LlcKnob for a metal ball bat
US6682447 *Jul 2, 2002Jan 27, 2004Donald E. BlackTraining bat system
US6692386 *Feb 13, 2001Feb 17, 2004Scott BrundageTraining sports club and method
US6733404 *Dec 28, 2001May 11, 2004Wilson Sporting Goods Co.Insert for a bat having an improved seam orientation
US6767299 *Jul 9, 2003Jul 27, 2004Jung-Shih ChangWood baseball bat
US6827659 *Sep 29, 2003Dec 7, 2004Shih-Pao ChenBat structure made of plant
US6869373Jul 15, 2002Mar 22, 2005American Trim, LlcKnob for a metal ball bat and method of attaching knob
US6878080 *Nov 12, 2003Apr 12, 2005Jung-Shih ChangCombination bat for baseball
US6899648 *Nov 12, 2003May 31, 2005Jung-Shih ChangWood bat internally and externally reinforced with composite material or metal
US6918843Jan 30, 2001Jul 19, 2005Micheal E. FranssenBaseball training bat
US6929573 *Mar 10, 2004Aug 16, 2005Jung-Shih ChangBat for baseball
US7011588 *Jan 26, 2004Mar 14, 2006Wilson Sporting Goods Co.Insert for a bat having an improved seam orientation
US7052419 *Jun 10, 2004May 30, 2006Jung-Shih ChangBall bat
US7128659 *Oct 17, 2003Oct 31, 2006Ming-Hsien LeeGolf club shaft made of fiber composite material and metal material
US7147580 *Jan 12, 2005Dec 12, 2006Nutter Sports, L.L.C.Warm-up bat
US7198581 *Jan 26, 2004Apr 3, 2007Black Donald ETraining bat system
US7410433Apr 28, 2006Aug 12, 2008Wilson Sporting Goods Co.Bat handle with optimal damping
US7771296 *Nov 5, 2008Aug 10, 2010Pinnacle Sports Equipment Co., Inc.Bamboo bat having fiber-fused core and method of manufacturing the same
US7878930Nov 15, 2007Feb 1, 2011Leinert Bruce RBaseball bat
US8066594Jan 10, 2011Nov 29, 2011Leinert Bruce RBaseball bat
US8277343 *May 27, 2010Oct 2, 2012Jung-Shih ChangBat constructed for striking a ball
US8702541 *Mar 14, 2012Apr 22, 2014AIBxC Onlus—Associazione Italiana Baseball giocato da CiechiApparatus and method for the game of baseball for the blind
US8801551Dec 3, 2012Aug 12, 2014Bruce R. LeinertBaseball bat
US8827846Feb 1, 2012Sep 9, 2014Christopher ShockleeSystem for selecting components of a modular bat
US8870688 *Jun 21, 2011Oct 28, 2014Pinnacle Sports Equipment Co. Inc.Bat having fiber-fused core section and method of manufacturing the same
US9186563 *Apr 11, 2013Nov 17, 2015Wilson Sporting Goods Co.Tamper-resistant ball bat
US9526960Aug 11, 2014Dec 27, 2016Bruce R. LeinertBaseball bat
US20030036434 *Jul 31, 2002Feb 20, 2003Jerry WuManufacturing method of a wooden stick sport device
US20040005940 *Jul 2, 2002Jan 8, 2004Black Donald E.Training bat system
US20040029660 *Aug 8, 2002Feb 12, 2004Chen Sam H.Laminated sport bat with internal chamber
US20040157689 *Jan 26, 2004Aug 12, 2004Wilson Sporting Goods Co.Insert for a bat having an improved seam orientation
US20040162169 *Feb 18, 2004Aug 19, 2004Brian GallagherTraining bat and method
US20040266566 *Jun 19, 2003Dec 30, 2004Tzyy-Yuang ShiangSwing-and-hit device for ball games
US20040266569 *Jun 26, 2003Dec 30, 2004Davis Marc ChristianLaminated ball bat with engineered sweet spot zone and method of making same
US20050020391 *Jul 17, 2003Jan 27, 2005Pinnacle Sports Equipment Co., Inc.Bamboo bat and method of manufacture
US20050059515 *Nov 12, 2003Mar 17, 2005Jung-Shih ChangCombination bat for baseball
US20050070383 *Nov 12, 2003Mar 31, 2005Jung-Shih ChangWood bat internally and externally reinforced with composite material or metal
US20050096161 *Nov 30, 2004May 5, 2005Brian GallagherTraining bat and method
US20050124441 *Jun 14, 2004Jun 9, 2005Wound Wood Technologies, LlcSpiral wound laminate wood and method for construction
US20050153797 *Jan 12, 2005Jul 14, 2005Nutter Mark E.Warm-up bat
US20050181897 *Feb 17, 2004Aug 18, 2005Davis ChenBlade member
US20050277497 *Jun 10, 2004Dec 15, 2005Jung-Shih ChangBall bat
US20060030437 *Sep 28, 2005Feb 9, 2006Pinnacle Sports Equipment Co., Inc.Bamboo bat and method of manufacture
US20060276270 *Jun 2, 2005Dec 7, 2006Haney Rodney AModified bat for sports training and method of making the same
US20060293130 *Apr 28, 2006Dec 28, 2006Wilson Sporting Goods Co.Bat handle with optimal damping
US20070066424 *Sep 14, 2006Mar 22, 2007Bratt Richard LWarm-Up Bat
US20070173358 *Feb 15, 2007Jul 26, 2007Brian GallagherTraining bat and method
US20090131206 *Nov 15, 2007May 21, 2009Leinert Bruce RBaseball bat
US20100113193 *Nov 5, 2008May 6, 2010Pinnacle Sports Equipment Co., Inc.Bamboo bat having fiber-fused core and method of manufacturing the same
US20100292035 *May 14, 2009Nov 18, 2010Tsung-Nien HuangSafety baseball bat
US20110105256 *Jan 10, 2011May 5, 2011Leinert Bruce RBaseball bat
US20110111892 *Nov 5, 2010May 12, 2011True Temper Sports, Inc.Bat with handle having internal core member and method of making same
US20110237366 *May 27, 2010Sep 29, 2011Jung-Shih ChangBat constructed for striking a ball
US20120065008 *Sep 9, 2010Mar 15, 2012Chi-Wen HuangBaseball bat structure and method for making the same
US20120157240 *Dec 16, 2011Jun 21, 2012Andrew Shane MorrisSwing Release Aid
US20120202622 *Jan 27, 2012Aug 9, 2012Gerald SenaLacrosse training device
US20120252608 *Mar 14, 2012Oct 4, 2012AIBxC Onlus - Associazione Italiana Baseball giocato da CiechiApparatus and method for the game of baseball for the blind
US20130316859 *Apr 11, 2013Nov 28, 2013George BurgerTamper-resistant ball bat
US20140100065 *Jun 10, 2013Apr 10, 2014Brian HARTSOCKRolled baseball bat
US20150306785 *Jul 10, 2015Oct 29, 2015Brian HARTSOCKRolled baseball bat
EP0172564A2 *Aug 20, 1985Feb 26, 1986Loxton Manufacturers (Pvt) LtdSporting equipment, such as hockey sticks, cricket bats and the like, and method of manufacturing such items
WO1991016953A1 *May 3, 1991Nov 14, 1991The Baum Research & Development Company, Inc.Composite baseball bat
WO1992018207A1 *Oct 24, 1991Oct 29, 1992Lanctot Paul ABaseball bat
WO1993023122A1 *May 14, 1993Nov 25, 1993The Baum Research & Development Company, Inc.Composite baseball bat
U.S. Classification473/568, 138/144, 473/519, 473/319, 473/567
International ClassificationA63B59/08, A63B59/00, A63B59/06, A63B53/00, A63B53/08
Cooperative ClassificationA63B59/06, A63B53/08, A63B59/08
European ClassificationA63B59/08, A63B59/06, A63B53/08