Assignee
ROLM CORP
23 granted patents·735 citations·filing 1975–1991
Top patents by PatentIndex Score
23 records- 0197US4163124AFinite storage-time queueROLM CORP·Filed 1978·Granted Jul 31, 1979·94 cites·16 claims
- 0292US4313036ADistributed CBX system employing packet networkROLM CORP·Filed 1980·Granted Jan 26, 1982·116 cites·13 claims
- 0389US4187466ASignal injection techniqueROLM CORP·Filed 1978·Granted Feb 5, 1980·36 cites·22 claims
- 0489US3999129AMethod and apparatus for error reduction in digital information transmission systemsROLM CORP·Filed 1975·Granted Dec 21, 1976·51 cites·22 claims
- 0588US4485470AData line interface for a time-division multiplexing (TDM) busROLM CORP·Filed 1982·Granted Nov 27, 1984·117 cites·18 claims
- 0686US4475235ASignature verification sensorROLM CORP·Filed 1982·Granted Oct 2, 1984·87 cites·8 claims
- 0781US4320520ATransmitter/receiver for use on common cable communications system such as ethernetROLM CORP·Filed 1980·Granted Mar 16, 1982·44 cites·10 claims
- 0874US4061887AKey telephone adapter for electronic telephone switching systemROLM CORP·Filed 1976·Granted Dec 6, 1977·16 cites·2 claims
- 0971US4627050ATime division multiplexed computerized branch exchangeROLM CORP·Filed 1984·Granted Dec 2, 1986·29 cites·16 claims
- 1068US4642805ADigital link for telephone station setsROLM CORP·Filed 1984·Granted Feb 10, 1987·17 cites·31 claims
- 1168US3985966AMethod and apparatus for generating digital dual frequency signalsROLM CORP·Filed 1975·Granted Oct 12, 1976·10 cites·12 claims
- 1263US4546388APower supply for CRT terminalROLM CORP·Filed 1982·Granted Oct 8, 1985·12 cites·11 claims
- 1361US4494229AInterconnecting apparatus for a distributed switching telephone systemROLM CORP·Filed 1981·Granted Jan 15, 1985·12 cites·8 claims
- 1460US4445048AHigh speed ribbon cable busROLM CORP·Filed 1983·Granted Apr 24, 1984·17 cites·11 claims
- 1558USD259639STelephone desk setROLM CORP·Filed 1978·Granted Jun 23, 1981·6 cites·1 claims
- 1656US4253000AMethod and system for reducing conference bridge oscillationsROLM CORP·Filed 1979·Granted Feb 24, 1981·7 cites·28 claims
- 1752US5070439ADC to DC converter apparatus employing push-pull oscillatorsROLM CORP·Filed 1991·Granted Dec 3, 1991·16 cites·20 claims
- 1852US4411004AInductively coupled sensing circuit and priority systemROLM CORP·Filed 1981·Granted Oct 18, 1983·13 cites·14 claims
- 1951US4600982ALow power consuming AC to DC converterROLM CORP·Filed 1985·Granted Jul 15, 1986·13 cites·4 claims
- 2051US4191862ADual frequency tone decoderROLM CORP·Filed 1978·Granted Mar 4, 1980·6 cites·6 claims
- 2144US4313037ATelephone station set with improved flash signallingROLM CORP·Filed 1980·Granted Jan 26, 1982·7 cites·3 claims
- 2239US4803699ABus apparatus with a plurality of transmittersROLM CORP·Filed 1986·Granted Feb 7, 1989·5 cites·5 claims
- 2333US4459558APhase locked loop having infinite gain at zero phase errorROLM CORP·Filed 1981·Granted Jul 10, 1984·4 cites·2 claims
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