Assignee
NORTEL NETWORKS LTD
CA·3,642 granted patents·313 pending applications·197,517 citations·filing 1991–2011
Top patents by PatentIndex Score
3,955 records- 0199US7551546B2Dual-mode shared OFDM methods/transmitters, receivers and systemsNORTEL NETWORKS LTD·Filed 2003·Granted Jun 23, 2009·239 cites·76 claims
- 0299US7227937B1Monitoring natural interaction for presence detectionNORTEL NETWORKS LTD·Filed 2002·Granted Jun 5, 2007·451 cites·28 claims
- 0399US7043651B2Technique for synchronizing clocks in a networkNORTEL NETWORKS LTD·Filed 2002·Granted May 9, 2006·282 cites·16 claims
- 0499US7020791B1Clock recovery using a double-exponential smoothing processNORTEL NETWORKS LTD·Filed 2002·Granted Mar 28, 2006·301 cites·20 claims
- 0599US6985434B2Adaptive time diversity and spatial diversity for OFDMNORTEL NETWORKS LTD·Filed 2000·Granted Jan 10, 2006·365 cites·67 claims
- 0699US6968994B1RF-ID for cable management and port identificationNORTEL NETWORKS LTD·Filed 2004·Granted Nov 29, 2005·198 cites·26 claims
- 0799US6658095B1Customized presence information deliveryNORTEL NETWORKS LTD·Filed 2002·Granted Dec 2, 2003·859 cites·33 claims
- 0898US7996746B2Structured low-density parity-check (LDPC) codeNORTEL NETWORKS LTD·Filed 2005·Granted Aug 9, 2011·100 cites·12 claims
- 0998US7986915B1Method and system for a wireless multi-hop relay networkNORTEL NETWORKS LTD·Filed 2007·Granted Jul 26, 2011·64 cites·4 claims
- 1098US7961696B2Preambles in OFDMA systemNORTEL NETWORKS LTD·Filed 2005·Granted Jun 14, 2011·61 cites·38 claims
- 1198US7957326B1Integrated home service networkNORTEL NETWORKS LTD·Filed 2005·Granted Jun 7, 2011·125 cites·22 claims
- 1298US7778337B2Scattered pilot pattern and channel estimation method for MIMO-OFDM systemsNORTEL NETWORKS LTD·Filed 2006·Granted Aug 17, 2010·72 cites·21 claims
- 1398US7769305B1High-speed digital signal processing in a coherent optical receiverNORTEL NETWORKS LTD·Filed 2006·Granted Aug 3, 2010·93 cites·31 claims
- 1498US7738437B2Physical layer structures and initial access schemes in an unsynchronized communication networkNORTEL NETWORKS LTD·Filed 2004·Granted Jun 15, 2010·109 cites·15 claims
- 1598US7636525B1Signal acquisition in a coherent optical receiverNORTEL NETWORKS LTD·Filed 2006·Granted Dec 22, 2009·120 cites·34 claims
- 1698US7548506B2System access and synchronization methods for MIMO OFDM communications systems and physical layer packet and preamble designNORTEL NETWORKS LTD·Filed 2002·Granted Jun 16, 2009·196 cites·20 claims
- 1798US7483964B1System, device, and method for providing personalized services in a communication systemNORTEL NETWORKS LTD·Filed 2000·Granted Jan 27, 2009·257 cites·66 claims
- 1898US7248559B2Scattered pilot pattern and channel estimation method for MIMO-OFDM systemsNORTEL NETWORKS LTD·Filed 2002·Granted Jul 24, 2007·202 cites·44 claims
- 1998US7222304B2Multitasking graphical user interfaceNORTEL NETWORKS LTD·Filed 2003·Granted May 22, 2007·268 cites·32 claims
- 2098US7215928B2Path selection in wireless networksNORTEL NETWORKS LTD·Filed 2003·Granted May 8, 2007·227 cites·20 claims
- 2198US7035923B1Presence information specifying communication preferencesNORTEL NETWORKS LTD·Filed 2002·Granted Apr 25, 2006·352 cites·23 claims
- 2298US6999454B1Information routing system and apparatusNORTEL NETWORKS LTD·Filed 2002·Granted Feb 14, 2006·319 cites·18 claims
- 2398US6876649B1High-capacity WDM-TDM packet switchNORTEL NETWORKS LTD·Filed 2000·Granted Apr 5, 2005·87 cites·53 claims
- 2498US6850481B2Channels estimation for multiple input—multiple output, orthogonal frequency division multiplexing (OFDM) systemNORTEL NETWORKS LTD·Filed 2000·Granted Feb 1, 2005·332 cites·59 claims
- 2598US6448899B1Power indicating ethernet outlet and method thereforNORTEL NETWORKS LTD·Filed 2000·Granted Sep 10, 2002·218 cites·28 claims
- 2698US6333973B1Integrated message centerNORTEL NETWORKS LTD·Filed 1997·Granted Dec 25, 2001·596 cites·33 claims
- 2798US6310610B1Intelligent touch displayNORTEL NETWORKS LTD·Filed 1997·Granted Oct 30, 2001·2.1k cites·31 claims
- 2898US6275685B1Linear amplifier arrangementNORTEL NETWORKS LTD·Filed 1998·Granted Aug 14, 2001·335 cites·23 claims
- 2998US6271952B1Polarization mode dispersion compensationNORTEL NETWORKS LTD·Filed 1998·Granted Aug 7, 2001·328 cites·51 claims
- 3098US6219162B1Methods for equalizing WDM systemsNORTEL NETWORKS LTD·Filed 2000·Granted Apr 17, 2001·92 cites·5 claims
- 3197US8018975B2Method and system for performing synchronization in OFDM systemsNORTEL NETWORKS LTD·Filed 2006·Granted Sep 13, 2011·38 cites·24 claims
- 3297US7979072B2Method and system for soft handoff in mobile broadband systemsNORTEL NETWORKS LTD·Filed 2005·Granted Jul 12, 2011·40 cites·8 claims
- 3397US7747934B2Method for selecting low density parity check (LDPC) code used for encoding of variable length dataNORTEL NETWORKS LTD·Filed 2006·Granted Jun 29, 2010·51 cites·19 claims
- 3497US7701842B2Low conversion rate digital dispersion compensationNORTEL NETWORKS LTD·Filed 2008·Granted Apr 20, 2010·113 cites·19 claims
- 3597US7684712B1Non-linear equalizer in a coherent optical receiverNORTEL NETWORKS LTD·Filed 2006·Granted Mar 23, 2010·59 cites·22 claims
- 3697US7656985B1Timestamp-based all digital phase locked loop for clock synchronization over packet networksNORTEL NETWORKS LTD·Filed 2006·Granted Feb 2, 2010·43 cites·18 claims
- 3797US7606498B1Carrier recovery in a coherent optical receiverNORTEL NETWORKS LTD·Filed 2006·Granted Oct 20, 2009·117 cites·22 claims
- 3897US7565407B1Network proxy apparatus and methodsNORTEL NETWORKS LTD·Filed 2000·Granted Jul 21, 2009·239 cites·8 claims
- 3997US7548758B2System and method for peer-to-peer communication in cellular systemsNORTEL NETWORKS LTD·Filed 2004·Granted Jun 16, 2009·110 cites·28 claims
- 4097US7522841B2Efficient data transmission and training of data processing functionsNORTEL NETWORKS LTD·Filed 2006·Granted Apr 21, 2009·46 cites·45 claims
- 4197US7406060B2Coverage improvement in wireless systems with fixed infrastructure based relaysNORTEL NETWORKS LTD·Filed 2005·Granted Jul 29, 2008·40 cites·7 claims
- 4297US7403570B2Preamble design for multiple input—multiple output (MIMO), orthogonal frequency division multiplexing (OFDM) systemNORTEL NETWORKS LTD·Filed 2007·Granted Jul 22, 2008·65 cites·17 claims
- 4397US7336601B2Adaptive time diversity and spatial diversity for OFDMNORTEL NETWORKS LTD·Filed 2005·Granted Feb 26, 2008·50 cites·9 claims
- 4497US7286564B2Mapping arbitrary signals into SONETNORTEL NETWORKS LTD·Filed 2005·Granted Oct 23, 2007·31 cites·28 claims
- 4597US7266306B1Method for optical carrier suppression and quadrature controlNORTEL NETWORKS LTD·Filed 2003·Granted Sep 4, 2007·167 cites·8 claims
- 4697US7233625B2Preamble design for multiple input—multiple output (MIMO), orthogonal frequency division multiplexing (OFDM) systemNORTEL NETWORKS LTD·Filed 2001·Granted Jun 19, 2007·188 cites·26 claims
- 4797US7209664B1Frequency agile transmitter and receiver architecture for DWDM systemsNORTEL NETWORKS LTD·Filed 2003·Granted Apr 24, 2007·88 cites·17 claims
- 4897US7174018B1Security framework for an IP mobility system using variable-based security associations and broker redirectionNORTEL NETWORKS LTD·Filed 2000·Granted Feb 6, 2007·213 cites·37 claims
- 4997US7170863B1Push-to-talk wireless telecommunications system utilizing a voice-over-IP networkNORTEL NETWORKS LTD·Filed 2001·Granted Jan 30, 2007·385 cites·20 claims
- 5097US7142503B1Communication system architecture and operating methodology providing a virtual neighborhood networkNORTEL NETWORKS LTD·Filed 2000·Granted Nov 28, 2006·297 cites·46 claims
Showing the top 50 of 3,955 patent records by PatentIndex Score.
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