Assignee
NORTHERN TELECOM LTD
CA·2,229 granted patents·1 pending application·102,815 citations·filing 1975–2004
Top patents by PatentIndex Score
2,230 records- 0199US4497411ADistributing frame for telecommunications systemsNORTHERN TELECOM LTD·Filed 1982·Granted Feb 5, 1985·179 cites·12 claims
- 0298US5886867AFerroelectric dielectric for integrated circuit applications at microwave frequenciesNORTHERN TELECOM LTD·Filed 1997·Granted Mar 23, 1999·300 cites·11 claims
- 0398US5828666AAccess to telecommunications networks in multi-service environmentNORTHERN TELECOM LTD·Filed 1997·Granted Oct 27, 1998·292 cites·6 claims
- 0498US5726980ATime division duplex communications repeaterNORTHERN TELECOM LTD·Filed 1996·Granted Mar 10, 1998·324 cites·12 claims
- 0598US5610910AAccess to telecommunications networks in multi-service environmentNORTHERN TELECOM LTD·Filed 1995·Granted Mar 11, 1997·947 cites·68 claims
- 0698US5583359ACapacitor structure for an integrated circuitNORTHERN TELECOM LTD·Filed 1995·Granted Dec 10, 1996·626 cites·19 claims
- 0798US5513029AMethod and apparatus for monitoring performance of optical transmission systemsNORTHERN TELECOM LTD·Filed 1994·Granted Apr 30, 1996·289 cites·32 claims
- 0898US5455888ASpeech bandwidth extension method and apparatusNORTHERN TELECOM LTD·Filed 1992·Granted Oct 3, 1995·631 cites·15 claims
- 0998US5293642AMethod of locating a mobile stationNORTHERN TELECOM LTD·Filed 1990·Granted Mar 8, 1994·505 cites·14 claims
- 1098US5071211AConnector holders and distribution frame and connector holder assemblies for optical cableNORTHERN TELECOM LTD·Filed 1989·Granted Dec 10, 1991·376 cites·51 claims
- 1198US4816784ABalanced planar transformersNORTHERN TELECOM LTD·Filed 1988·Granted Mar 28, 1989·239 cites·30 claims
- 1298US4373776AProtection case for optical fiber splicesNORTHERN TELECOM LTD·Filed 1980·Granted Feb 15, 1983·250 cites·11 claims
- 1398US4275290AThermally activated liquid ink printingNORTHERN TELECOM LTD·Filed 1979·Granted Jun 23, 1981·130 cites·5 claims
- 1497US5953338ADynamic control processes and systems for asynchronous transfer mode networksNORTHERN TELECOM LTD·Filed 1996·Granted Sep 14, 1999·406 cites·60 claims
- 1597US5857020ATimed availability of secured content provisioned on a storage mediumNORTHERN TELECOM LTD·Filed 1995·Granted Jan 5, 1999·612 cites·37 claims
- 1697US5828293AData transmission over a power line communications systemNORTHERN TELECOM LTD·Filed 1997·Granted Oct 27, 1998·219 cites·18 claims
- 1797US5825792AWavelength monitoring and control assembly for WDM optical transmission systemsNORTHERN TELECOM LTD·Filed 1996·Granted Oct 20, 1998·336 cites·19 claims
- 1897US5789303AMethod of adding on chip capacitors to an integrated circuitNORTHERN TELECOM LTD·Filed 1996·Granted Aug 4, 1998·265 cites·19 claims
- 1997US5770971ADistortion compensation control for a power amplifierNORTHERN TELECOM LTD·Filed 1996·Granted Jun 23, 1998·172 cites·19 claims
- 2097US5374887AInrush current limiting circuitNORTHERN TELECOM LTD·Filed 1993·Granted Dec 20, 1994·135 cites·4 claims
- 2197US5191628AOptical amplifiersNORTHERN TELECOM LTD·Filed 1991·Granted Mar 2, 1993·123 cites·5 claims
- 2297US5167001AOptical fiber storage and connector tray and shelf and tray assemblyNORTHERN TELECOM LTD·Filed 1991·Granted Nov 24, 1992·439 cites·15 claims
- 2397US5138688AOptical connector holder assemblyNORTHERN TELECOM LTD·Filed 1990·Granted Aug 11, 1992·236 cites·11 claims
- 2497US4399541ALight emitting device package having combined heater/coolerNORTHERN TELECOM LTD·Filed 1981·Granted Aug 16, 1983·100 cites·12 claims
- 2597US4313150ALatching lever for printed circuit boardsNORTHERN TELECOM LTD·Filed 1979·Granted Jan 26, 1982·130 cites·8 claims
- 2697US4166277AElectrostatic ink ejection printing headNORTHERN TELECOM LTD·Filed 1977·Granted Aug 28, 1979·77 cites·5 claims
- 2796US6088225ACabinet with enhanced convection coolingNORTHERN TELECOM LTD·Filed 1998·Granted Jul 11, 2000·148 cites·15 claims
- 2896US5349587AMultiple clock rate test apparatus for testing digital systemsNORTHERN TELECOM LTD·Filed 1992·Granted Sep 20, 1994·201 cites·19 claims
- 2996US5006810ASecond order active filtersNORTHERN TELECOM LTD·Filed 1989·Granted Apr 9, 1991·112 cites·20 claims
- 3096USD315896SKeypadNORTHERN TELECOM LTD·Filed 1989·Granted Apr 2, 1991·69 cites·1 claims
- 3196USD297007SHousing for electronic apparatusNORTHERN TELECOM LTD·Filed 1986·Granted Aug 2, 1988·56 cites·1 claims
- 3296US4680583ATerminal address assignment in a broadcast transmission systemNORTHERN TELECOM LTD·Filed 1985·Granted Jul 14, 1987·212 cites·11 claims
- 3396US4522501AMonitoring magnetically permeable particles in admixture with a fluid carrierNORTHERN TELECOM LTD·Filed 1984·Granted Jun 11, 1985·125 cites·12 claims
- 3496US4421284AReeling of cableNORTHERN TELECOM LTD·Filed 1981·Granted Dec 20, 1983·79 cites·25 claims
- 3596US4390898AScrambling and unscrambling video signals in a pay TV systemNORTHERN TELECOM LTD·Filed 1981·Granted Jun 28, 1983·246 cites·16 claims
- 3696US4359262ATray for organizing optical fiber splices and enclosures embodying such traysNORTHERN TELECOM LTD·Filed 1980·Granted Nov 16, 1982·280 cites·27 claims
- 3796US4342944ALight emitting diodes with high external quantum efficiencyNORTHERN TELECOM LTD·Filed 1980·Granted Aug 3, 1982·132 cites·17 claims
- 3895US6363262B1Communication device having a wideband receiver and operating method thereforNORTHERN TELECOM LTD·Filed 1998·Granted Mar 26, 2002·166 cites·22 claims
- 3995US6345047B1Computer telephony adapter and methodNORTHERN TELECOM LTD·Filed 1998·Granted Feb 5, 2002·286 cites·18 claims
- 4095US6181738B1Reverse link power control using a frame quality metricNORTHERN TELECOM LTD·Filed 1998·Granted Jan 30, 2001·176 cites·12 claims
- 4195US6091957ASystem and method for providing a geographic location of a mobile telecommunications unitNORTHERN TELECOM LTD·Filed 1997·Granted Jul 18, 2000·316 cites·7 claims
- 4295US5973641AAntenna feed network arrangementNORTHERN TELECOM LTD·Filed 1995·Granted Oct 26, 1999·181 cites·18 claims
- 4395US5953670AArrangement for providing cellular communication via a CATV networkNORTHERN TELECOM LTD·Filed 1996·Granted Sep 14, 1999·205 cites·6 claims
- 4495US5943399AMethods and apparatus for providing communications to telecommunications terminalsNORTHERN TELECOM LTD·Filed 1996·Granted Aug 24, 1999·436 cites·18 claims
- 4595US5850205AAutomatic contrast control for liquid crystal displaysNORTHERN TELECOM LTD·Filed 1997·Granted Dec 15, 1998·210 cites·28 claims
- 4695US5831992AMethods and apparatus for fault diagnosis in self-testable systemsNORTHERN TELECOM LTD·Filed 1997·Granted Nov 3, 1998·155 cites·12 claims
- 4795US5548636AMethod and apparatus for providing user controlled call management servicesNORTHERN TELECOM LTD·Filed 1995·Granted Aug 20, 1996·376 cites·2 claims
- 4895US5515475ASpeech recognition method using a two-pass searchNORTHERN TELECOM LTD·Filed 1993·Granted May 7, 1996·314 cites·8 claims
- 4995US5452178AStructure and method of making a capacitor for an intergrated circuitNORTHERN TELECOM LTD·Filed 1994·Granted Sep 19, 1995·177 cites·10 claims
- 5095US5354712AMethod for forming interconnect structures for integrated circuitsNORTHERN TELECOM LTD·Filed 1992·Granted Oct 11, 1994·463 cites·21 claims
Showing the top 50 of 2,230 patent records by PatentIndex Score.
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