Assignee
OCTEL COMMUNICATIONS CORP
US·26 granted patents·3,138 citations·filing 1986–1998
Top patents by PatentIndex Score
26 records- 0197US5740231ANetwork-based multimedia communications and directory system and method of operationOCTEL COMMUNICATIONS CORP·Filed 1994·Granted Apr 14, 1998·818 cites·56 claims
- 0296US5740230ADirectory management system and methodOCTEL COMMUNICATIONS CORP·Filed 1996·Granted Apr 14, 1998·301 cites·41 claims
- 0396US5621727ASystem and method for private addressing plans using community addressingOCTEL COMMUNICATIONS CORP·Filed 1995·Granted Apr 15, 1997·340 cites·2 claims
- 0494US6064723ANetwork-based multimedia communications and directory system and method of operationOCTEL COMMUNICATIONS CORP·Filed 1998·Granted May 16, 2000·292 cites·8 claims
- 0591US6094476ASpeech-responsive voice messaging system and methodOCTEL COMMUNICATIONS CORP·Filed 1997·Granted Jul 25, 2000·139 cites·7 claims
- 0689US5483580AMethods and apparatus for non-simultaneous transmittal and storage of voice message and digital text or imageOCTEL COMMUNICATIONS CORP·Filed 1993·Granted Jan 9, 1996·144 cites·30 claims
- 0787US5940478AMethod and system for extended addressing plansOCTEL COMMUNICATIONS CORP·Filed 1996·Granted Aug 17, 1999·133 cites·15 claims
- 0884US5761201ASystem and method for private addressing plans using community addressingOCTEL COMMUNICATIONS CORP·Filed 1997·Granted Jun 2, 1998·118 cites·2 claims
- 0983US5179585AIntegrated voice messaging/voice response systemOCTEL COMMUNICATIONS CORP·Filed 1991·Granted Jan 12, 1993·113 cites·10 claims
- 1076US4811381ADirect inward dial integration apparatusOCTEL COMMUNICATIONS CORP·Filed 1987·Granted Mar 7, 1989·72 cites·11 claims
- 1175US6097791AVoice-messaging system with non-user outcalling and auto-provisioning capabilitiesOCTEL COMMUNICATIONS CORP·Filed 1997·Granted Aug 1, 2000·82 cites·31 claims
- 1275US4797672AVoice network security systemOCTEL COMMUNICATIONS CORP·Filed 1986·Granted Jan 10, 1989·59 cites·3 claims
- 1374US5982856ANetwork-based multimedia communications and directory system and method of operationOCTEL COMMUNICATIONS CORP·Filed 1998·Granted Nov 9, 1999·61 cites·2 claims
- 1474US5247497ASecurity systems based on recording unique identifier for subsequent playbackOCTEL COMMUNICATIONS CORP·Filed 1991·Granted Sep 21, 1993·66 cites·16 claims
- 1571US5416830AIntegrated voice meassaging/voice response systemOCTEL COMMUNICATIONS CORP·Filed 1993·Granted May 16, 1995·55 cites·8 claims
- 1667US5394460AVoice processing systems connected in a clusterOCTEL COMMUNICATIONS CORP·Filed 1994·Granted Feb 28, 1995·43 cites·9 claims
- 1765US5301226AVoice processing systems connected in a clusterOCTEL COMMUNICATIONS CORP·Filed 1992·Granted Apr 5, 1994·39 cites·7 claims
- 1863US5136648AMessage storage security systemOCTEL COMMUNICATIONS CORP·Filed 1990·Granted Aug 4, 1992·53 cites·4 claims
- 1962US5239574AMethods and apparatus for detecting voice information in telephone-type signalsOCTEL COMMUNICATIONS CORP·Filed 1990·Granted Aug 24, 1993·37 cites·15 claims
- 2061US4807274ATelephone line quality testing systemOCTEL COMMUNICATIONS CORP·Filed 1988·Granted Feb 21, 1989·24 cites·12 claims
- 2160US5479498ADigital line card having universal port for upgrading electronic messaging systemOCTEL COMMUNICATIONS CORP·Filed 1993·Granted Dec 26, 1995·39 cites·20 claims
- 2260US5164989AEcho cancellation methods and apparatus for voice processing systemsOCTEL COMMUNICATIONS CORP·Filed 1990·Granted Nov 17, 1992·31 cites·12 claims
- 2357US4873718AFeature telephone integration deviceOCTEL COMMUNICATIONS CORP·Filed 1988·Granted Oct 10, 1989·19 cites·6 claims
- 2456US5257309ADual tone multifrequency signal detection and identification methods and apparatusOCTEL COMMUNICATIONS CORP·Filed 1990·Granted Oct 26, 1993·32 cites·32 claims
- 2548US5414757AVoice mail system for news bulletinsOCTEL COMMUNICATIONS CORP·Filed 1993·Granted May 9, 1995·17 cites·7 claims
- 2642US5519507ABatching and delayed transmission of facsimilesOCTEL COMMUNICATIONS CORP·Filed 1995·Granted May 21, 1996·11 cites·26 claims
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