Assignee
BELL TELEPHONE LABOR INC
2,587 granted patents·81,205 citations·filing 1941–1989
Top patents by PatentIndex Score
2,587 records- 0199US4313197ASpread spectrum arrangement for (de)multiplexing speech signals and nonspeech signalsBELL TELEPHONE LABOR INC·Filed 1980·Granted Jan 26, 1982·401 cites·8 claims
- 0299US4313035AMethod of providing person locator serviceBELL TELEPHONE LABOR INC·Filed 1980·Granted Jan 26, 1982·684 cites·31 claims
- 0399US4249181ACellular mobile radiotelephone system using tilted antenna radiation patternsBELL TELEPHONE LABOR INC·Filed 1979·Granted Feb 3, 1981·177 cites·8 claims
- 0499US4246584AHybrid mode waveguide or feedhorn antennaBELL TELEPHONE LABOR INC·Filed 1979·Granted Jan 20, 1981·260 cites·7 claims
- 0599US4217027AOptical fiber fabrication and resulting productBELL TELEPHONE LABOR INC·Filed 1977·Granted Aug 12, 1980·181 cites·26 claims
- 0699US4191860AData base communication call processing methodBELL TELEPHONE LABOR INC·Filed 1978·Granted Mar 4, 1980·649 cites·23 claims
- 0799US4178557ALinear amplification with nonlinear devicesBELL TELEPHONE LABOR INC·Filed 1978·Granted Dec 11, 1979·102 cites·5 claims
- 0899US3967273AMethod and apparatus for using pushbutton telephone keys for generation of alpha-numeric informationBELL TELEPHONE LABOR INC·Filed 1974·Granted Jun 29, 1976·195 cites·7 claims
- 0998US4468672AWide bandwidth hybrid mode feedsBELL TELEPHONE LABOR INC·Filed 1981·Granted Aug 28, 1984·166 cites·7 claims
- 1098US4441080AAmplifier with controlled gainBELL TELEPHONE LABOR INC·Filed 1981·Granted Apr 3, 1984·175 cites·6 claims
- 1198US4381562ABroadcast type satellite communication systemsBELL TELEPHONE LABOR INC·Filed 1980·Granted Apr 26, 1983·232 cites·10 claims
- 1298US4319940AMethods of making cable having superior resistance to flame spread and smoke evolutionBELL TELEPHONE LABOR INC·Filed 1981·Granted Mar 16, 1982·145 cites·4 claims
- 1398US4259540AFilled cablesBELL TELEPHONE LABOR INC·Filed 1979·Granted Mar 31, 1981·542 cites·8 claims
- 1498US4237484ATechnique for transmitting digital data together with a video signalBELL TELEPHONE LABOR INC·Filed 1979·Granted Dec 2, 1980·246 cites·15 claims
- 1598US4196396AInterferometer apparatus using electro-optic material with feedbackBELL TELEPHONE LABOR INC·Filed 1978·Granted Apr 1, 1980·164 cites·7 claims
- 1698US4191995ADigital automatic gain control circuitBELL TELEPHONE LABOR INC·Filed 1979·Granted Mar 4, 1980·83 cites·10 claims
- 1798US4190352AMethod and apparatus for continuously patterning a photosensitive tapeBELL TELEPHONE LABOR INC·Filed 1977·Granted Feb 26, 1980·59 cites·14 claims
- 1898US4181821AMultiple template speech recognition systemBELL TELEPHONE LABOR INC·Filed 1978·Granted Jan 1, 1980·216 cites·26 claims
- 1998US4160934ACurrent control circuit for light emitting diodeBELL TELEPHONE LABOR INC·Filed 1977·Granted Jul 10, 1979·166 cites·12 claims
- 2098US4145699ASuperconducting junctions utilizing a binary semiconductor barrierBELL TELEPHONE LABOR INC·Filed 1978·Granted Mar 20, 1979·559 cites·11 claims
- 2198US4100377APacket transmission of speechBELL TELEPHONE LABOR INC·Filed 1977·Granted Jul 11, 1978·243 cites·14 claims
- 2298US4090147AInterferometric amplifierBELL TELEPHONE LABOR INC·Filed 1977·Granted May 16, 1978·69 cites·10 claims
- 2398US4063106AOptical fiber Raman oscillatorBELL TELEPHONE LABOR INC·Filed 1977·Granted Dec 13, 1977·150 cites·13 claims
- 2498US4058758ACooperative primary and secondary current limiting to selectively limit aggregate and individual current outputs of a multi output converterBELL TELEPHONE LABOR INC·Filed 1976·Granted Nov 15, 1977·91 cites·16 claims
- 2598US4024452AIntegrated solid state isolator circuitBELL TELEPHONE LABOR INC·Filed 1976·Granted May 17, 1977·91 cites·5 claims
- 2698US4020332AInterpolation-decimation circuit for increasing or decreasing digital sampling frequencyBELL TELEPHONE LABOR INC·Filed 1975·Granted Apr 26, 1977·217 cites·9 claims
- 2798US3958136ALevel shifter circuitBELL TELEPHONE LABOR INC·Filed 1974·Granted May 18, 1976·208 cites·5 claims
- 2897US4453217ADirectory lookup method and apparatusBELL TELEPHONE LABOR INC·Filed 1982·Granted Jun 5, 1984·142 cites·59 claims
- 2997US4445213ACommunication line interface for controlling data information having differing transmission characteristicsBELL TELEPHONE LABOR INC·Filed 1982·Granted Apr 24, 1984·202 cites·14 claims
- 3097US4432132AFormation of sidewall oxide layers by reactive oxygen ion etching to define submicron featuresBELL TELEPHONE LABOR INC·Filed 1981·Granted Feb 21, 1984·316 cites·16 claims
- 3197US4413263APhased array antenna employing linear scan for wide angle orbital arc coverageBELL TELEPHONE LABOR INC·Filed 1981·Granted Nov 1, 1983·166 cites·7 claims
- 3297US4395675ATransformerless noninverting buck boost switching regulatorBELL TELEPHONE LABOR INC·Filed 1981·Granted Jul 26, 1983·139 cites·13 claims
- 3397US4383272AVideo signal interpolation using motion estimationBELL TELEPHONE LABOR INC·Filed 1981·Granted May 10, 1983·167 cites·24 claims
- 3497US4365222AStripline support assemblyBELL TELEPHONE LABOR INC·Filed 1981·Granted Dec 21, 1982·80 cites·6 claims
- 3597US4326805AMethod and apparatus for aligning mask and wafer membersBELL TELEPHONE LABOR INC·Filed 1980·Granted Apr 27, 1982·136 cites·7 claims
- 3697US4324038AMethod of fabricating MOS field effect transistorsBELL TELEPHONE LABOR INC·Filed 1980·Granted Apr 13, 1982·128 cites·20 claims
- 3797US4310727AMethod of processing special service telephone callsBELL TELEPHONE LABOR INC·Filed 1980·Granted Jan 12, 1982·233 cites·10 claims
- 3897US4298237APrinted wiring board interconnection apparatusBELL TELEPHONE LABOR INC·Filed 1979·Granted Nov 3, 1981·115 cites·17 claims
- 3997US4277649AMethod and apparatus for screening telephone callsBELL TELEPHONE LABOR INC·Filed 1980·Granted Jul 7, 1981·439 cites·15 claims
- 4097US4274854APolarization-preserving optical fiberBELL TELEPHONE LABOR INC·Filed 1979·Granted Jun 23, 1981·96 cites·14 claims
- 4197US4275385AInfrared personnel locator systemBELL TELEPHONE LABOR INC·Filed 1979·Granted Jun 23, 1981·555 cites·22 claims
- 4297US4262035AModified chemical vapor deposition of an optical fiber using an rf plasmaBELL TELEPHONE LABOR INC·Filed 1980·Granted Apr 14, 1981·97 cites·10 claims
- 4397US4213095AFeedforward nonlinear equalization of modulated data signalsBELL TELEPHONE LABOR INC·Filed 1978·Granted Jul 15, 1980·183 cites·25 claims
- 4497US4176908ADevices for monitoring, switching, attenuating or distributing lightBELL TELEPHONE LABOR INC·Filed 1977·Granted Dec 4, 1979·120 cites·20 claims
- 4597US4176240AFilled electrical cableBELL TELEPHONE LABOR INC·Filed 1978·Granted Nov 27, 1979·114 cites·3 claims
- 4697US4157612AMethod for improving the transmission properties of a connectorized flat cable interconnection assemblyBELL TELEPHONE LABOR INC·Filed 1977·Granted Jun 12, 1979·150 cites·16 claims
- 4797US4146297ATunable optical waveguide directional coupler filterBELL TELEPHONE LABOR INC·Filed 1978·Granted Mar 27, 1979·133 cites·8 claims
- 4897US4131767AEcho cancellation in two-wire, two-way data transmission systemsBELL TELEPHONE LABOR INC·Filed 1978·Granted Dec 26, 1978·142 cites·10 claims
- 4997US4119363APackage for optical devices including optical fiber-to-metal hermetic sealBELL TELEPHONE LABOR INC·Filed 1976·Granted Oct 10, 1978·197 cites·15 claims
- 5097US4111524AWavelength division multiplexerBELL TELEPHONE LABOR INC·Filed 1977·Granted Sep 5, 1978·149 cites·4 claims
Showing the top 50 of 2,587 patent records by PatentIndex Score.
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