Assignee
AT & T CORP
US·4,306 granted patents·78 pending applications·315,597 citations·filing 1985–2013
Top patents by PatentIndex Score
4,384 records- 0199US7466919B1System for flexible multiple broadcast service delivery over a WDM passive optical network based on RF block-conversion, of RF service bands within wavelength bandsAT & T CORP·Filed 2006·Granted Dec 16, 2008·56 cites·3 claims
- 0299US7343148B1Modification of portable communications device operation in vehiclesAT & T CORP·Filed 2005·Granted Mar 11, 2008·126 cites·16 claims
- 0399US7289489B1Method for billing IP broadband subscribersAT & T CORP·Filed 2004·Granted Oct 30, 2007·345 cites·16 claims
- 0499US7197460B1System for handling frequently asked questions in a natural language dialog serviceAT & T CORP·Filed 2002·Granted Mar 27, 2007·518 cites·19 claims
- 0599US7181207B1Method and apparatus for over-the-air activation of neighborhood cordless-type servicesAT & T CORP·Filed 2005·Granted Feb 20, 2007·199 cites·2 claims
- 0699US7145440B2Broadband coupler technique for electrical connection to power linesAT & T CORP·Filed 2004·Granted Dec 5, 2006·238 cites·34 claims
- 0799US7095754B2Tiered contention multiple access (TCMA): a method for priority-based shared channel accessAT & T CORP·Filed 2001·Granted Aug 22, 2006·323 cites·36 claims
- 0899US7068628B2MIMO OFDM systemAT & T CORP·Filed 2001·Granted Jun 27, 2006·252 cites·44 claims
- 0999US6973333B1Modification of portable communications device operation in vehiclesAT & T CORP·Filed 2001·Granted Dec 6, 2005·228 cites·33 claims
- 1099US6909745B1Content adaptive video encoderAT & T CORP·Filed 2001·Granted Jun 21, 2005·257 cites·12 claims
- 1199US6832245B1System and method for analyzing communications of user messages to rank users and contacts based on message contentAT & T CORP·Filed 2000·Granted Dec 14, 2004·423 cites·9 claims
- 1299US6826173B1Enhanced subscriber IP alertingAT & T CORP·Filed 1999·Granted Nov 30, 2004·469 cites·2 claims
- 1399US6808116B1Fiber jumpers with data storage method and apparatusAT & T CORP·Filed 2002·Granted Oct 26, 2004·256 cites·12 claims
- 1499US6760775B1System, method and apparatus for network service load and reliability managementAT & T CORP·Filed 2000·Granted Jul 6, 2004·539 cites·8 claims
- 1599US6714909B1System and method for automated multimedia content indexing and retrievalAT & T CORP·Filed 2000·Granted Mar 30, 2004·277 cites·8 claims
- 1699US6704360B2Bidirectionally predicted pictures or video object planes for efficient and flexible video codingAT & T CORP·Filed 2001·Granted Mar 9, 2004·164 cites·30 claims
- 1799US6684187B1Method and system for preselection of suitable units for concatenative speechAT & T CORP·Filed 2000·Granted Jan 27, 2004·286 cites·7 claims
- 1899US6542500B1Network server platform (NSP) for a hybrid coaxial/twisted pair local loop network service architectureAT & T CORP·Filed 1998·Granted Apr 1, 2003·416 cites·23 claims
- 1999US6505169B1Method for adaptive ad insertion in streaming multimedia contentAT & T CORP·Filed 2000·Granted Jan 7, 2003·714 cites·7 claims
- 2099US6505158B1Synthesis-based pre-selection of suitable units for concatenative speechAT & T CORP·Filed 2000·Granted Jan 7, 2003·325 cites·10 claims
- 2199US6452923B1Cable connected wan interconnectivity services for corporate telecommutersAT & T CORP·Filed 1998·Granted Sep 17, 2002·794 cites·13 claims
- 2299US6373817B1Chase me systemAT & T CORP·Filed 1999·Granted Apr 16, 2002·547 cites·17 claims
- 2399US6366933B1Method and apparatus for tracking and viewing changes on the webAT & T CORP·Filed 1995·Granted Apr 2, 2002·634 cites·10 claims
- 2499US6252952B1Personal user network (closed user network) PUN/CUNAT & T CORP·Filed 1999·Granted Jun 26, 2001·506 cites·7 claims
- 2599US6173261B1Grammar fragment acquisition using syntactic and semantic clusteringAT & T CORP·Filed 1998·Granted Jan 9, 2001·543 cites·23 claims
- 2699US6052594ASystem and method for dynamically assigning channels for wireless packet communicationsAT & T CORP·Filed 1997·Granted Apr 18, 2000·690 cites·14 claims
- 2799US6014090AMethod and apparatus for delivering local information to travelersAT & T CORP·Filed 1997·Granted Jan 11, 2000·1.2k cites·40 claims
- 2899US5500761AMicromechanical modulatorAT & T CORP·Filed 1994·Granted Mar 19, 1996·565 cites·55 claims
- 2999US5479482ACellular terminal for providing public emergency call location informationAT & T CORP·Filed 1994·Granted Dec 26, 1995·789 cites·59 claims
- 3099US5394489AWavelength division multiplexed optical communication transmittersAT & T CORP·Filed 1993·Granted Feb 28, 1995·241 cites·18 claims
- 3199US5388147ACellular telecommunication switching system for providing public emergency call location informationAT & T CORP·Filed 1993·Granted Feb 7, 1995·819 cites·16 claims
- 3298US7626496B1Negative feedback loop for defect management of plant protection ticket screeningAT & T CORP·Filed 2007·Granted Dec 1, 2009·79 cites·20 claims
- 3398US7451081B1System and method of performing speech recognition based on a user identifierAT & T CORP·Filed 2007·Granted Nov 11, 2008·216 cites·20 claims
- 3498US7394345B1Arrangement for indicating presence of individualAT & T CORP·Filed 2003·Granted Jul 1, 2008·404 cites·3 claims
- 3598US7231341B2System and method for natural language generationAT & T CORP·Filed 2005·Granted Jun 12, 2007·84 cites·17 claims
- 3698US7180852B1Method for selecting a restoration path in a mesh networkAT & T CORP·Filed 2005·Granted Feb 20, 2007·33 cites·12 claims
- 3798US7180877B1Asymmetric measurement-based dynamic packet assignment system and method for wireless data servicesAT & T CORP·Filed 2005·Granted Feb 20, 2007·72 cites·7 claims
- 3898US7136361B2Hybrid coordination function (HCF) access through tiered contention and overlapped wireless cell mitigationAT & T CORP·Filed 2002·Granted Nov 14, 2006·190 cites·6 claims
- 3998US7133380B1System and method for selecting a transmission channel in a wireless communication system that includes an adaptive arrayAT & T CORP·Filed 2001·Granted Nov 7, 2006·148 cites·22 claims
- 4098US7058367B1Rate-adaptive methods for communicating over multiple input/multiple output wireless systemsAT & T CORP·Filed 2003·Granted Jun 6, 2006·194 cites·21 claims
- 4198US7010002B2Broadband network with enterprise wireless communication method for residential and business environmentAT & T CORP·Filed 2001·Granted Mar 7, 2006·222 cites·23 claims
- 4298US7003308B1Method and system for handwritten electronic messagingAT & T CORP·Filed 2004·Granted Feb 21, 2006·302 cites·2 claims
- 4398US6982951B2Method for selecting a restoration path in a mesh networkAT & T CORP·Filed 2001·Granted Jan 3, 2006·85 cites·11 claims
- 4498US6961559B1Distributed network voice messaging for wireless centrex telephonyAT & T CORP·Filed 2000·Granted Nov 1, 2005·325 cites·28 claims
- 4598US6937595B2Multifunction interface facility connecting wideband multiple access subscriber loops with various networksAT & T CORP·Filed 2001·Granted Aug 30, 2005·243 cites·3 claims
- 4698US6895375B2System for bandwidth extension of Narrow-band speechAT & T CORP·Filed 2001·Granted May 17, 2005·268 cites·94 claims
- 4798US6889355B1Method and apparatus for data transmission using multiple transmit antennasAT & T CORP·Filed 2000·Granted May 3, 2005·79 cites·16 claims
- 4898US6882619B1Interference suppressing OFDM method for wireless communicationsAT & T CORP·Filed 2002·Granted Apr 19, 2005·92 cites·22 claims
- 4998US6868383B1Systems and methods for extracting meaning from multimodal inputs using finite-state devicesAT & T CORP·Filed 2001·Granted Mar 15, 2005·179 cites·31 claims
- 5098US6856800B1Fast authentication and access control system for mobile networkingAT & T CORP·Filed 2002·Granted Feb 15, 2005·236 cites·10 claims
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