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Publication numberUS2868884 A
Publication typeGrant
Publication dateJan 13, 1959
Filing dateMay 6, 1952
Priority dateMay 6, 1952
Publication numberUS 2868884 A, US 2868884A, US-A-2868884, US2868884 A, US2868884A
InventorsEdward Jacobitti, Gooderham John W, Oscar Myers, Shipley Frank F, Strickler Walter B
Original AssigneeBell Telephone Labor Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Toll switching telephone system
US 2868884 A
Abstract  available in
Description  available in
Claims  available in
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1862549 *Jun 11, 1931Jun 14, 1932Bell Telephone Labor IncTelephone system
US2093667 *Jul 11, 1935Sep 21, 1937Bell Telephone Labor IncPad control system
US2115801 *Jan 29, 1937May 3, 1938Bell Telephone Labor IncLine overflow recorder
US2183656 *Feb 12, 1938Dec 19, 1939Associated Electric Lab IncAutomatic telephone system
US2339709 *May 28, 1942Jan 18, 1944Automatic Elect LabTelephone system
US2364445 *Dec 30, 1943Dec 5, 1944Bell Telephone Labor IncTelephone system
US2378541 *Oct 22, 1942Jun 19, 1945Bell Telephone Labor IncTraffic observing apparatus
US2416710 *Dec 28, 1943Mar 4, 1947Bell Telephone Labor IncMarker circuit for crossbar telephone systems
US2467490 *Mar 24, 1945Apr 19, 1949Automatic Elect LabTelephone connection between exchanges of the decimal step-by-step type and the nondecimal revertive impulse control type
US2490221 *Jan 3, 1947Dec 6, 1949Automatic Elect LabAutomatic restricted service telephone system
US2508656 *Nov 30, 1945May 23, 1950Automatic Elect LabInterconnecting arrangement between telephone systems of the strowger and rotary revertive control types
US2516788 *Nov 21, 1945Jul 25, 1950Automatic Elect LabTelephone system
US2580709 *Nov 14, 1947Jan 1, 1952Automatic Elect LabToll switching telephone system having automatic amplifier insertion and gain setting
US2580757 *Oct 29, 1948Jan 1, 1952Bell Telephone Labor IncAlarm sending circuit
US2597209 *Feb 11, 1950May 20, 1952Automatic Elect LabTelephone system
US2605965 *May 15, 1950Aug 5, 1952O'd Shepherd JudsonData translator employing displaceable data cards
US2631195 *Jan 29, 1949Mar 10, 1953Automatic Elect LabToll switching system
US2636947 *Dec 16, 1949Apr 28, 1953Bell Telephone Labor IncTwo-way trunk for pulse conversion systems
US2651681 *May 11, 1950Sep 8, 1953Int Standard Electric CorpAutomatic switching system
US2694154 *Aug 25, 1950Nov 9, 1954Bell Telephone Labor IncCard translator optical system
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3025357 *Dec 28, 1956Mar 13, 1962Bell Telephone Labor IncClass translator circuits
US3231671 *May 27, 1959Jan 25, 1966North Electric CoAutomatic toll ticketing rate selector
US4065643 *Nov 17, 1976Dec 27, 1977Bell Telephone LaboratoriesCommunication facility integrity checking arrangement
DE1242717B *Jul 12, 1961Jun 22, 1967Western Electric CoSchaltungsanordnung zur Stoerungsanzeige und -registrierung in Fernmeldevermittlungsanlagen
U.S. Classification379/224, 379/289, 379/288
International ClassificationH04Q3/00
Cooperative ClassificationH04Q3/0004
European ClassificationH04Q3/00B