Assignee
KDD CORP
JP·49 granted patents·1,480 citations·filing 1998–2005
Top patents by PatentIndex Score
49 records- 0193US6301577B1Similar document retrieval method using plural similarity calculation methods and recommended article notification service system using similar document retrieval methodKDD CORP·Filed 2000·Granted Oct 9, 2001·95 cites·9 claims
- 0292US6973126B1Video coding apparatus according to a feature of a video pictureKDD CORP·Filed 2000·Granted Dec 6, 2005·56 cites·7 claims
- 0391US6473459B1Scene change detectorKDD CORP·Filed 1999·Granted Oct 29, 2002·147 cites·20 claims
- 0490US6526261B1Control method of transmitting power in cellular systemKDD CORP·Filed 2000·Granted Feb 25, 2003·64 cites·86 claims
- 0587US6532091B1Optical digital regeneratorKDD CORP·Filed 1999·Granted Mar 11, 2003·92 cites·31 claims
- 0684US6594003B1Measuring system of transmission characteristicsKDD CORP·Filed 2000·Granted Jul 15, 2003·28 cites·13 claims
- 0782US6594428B1Dispersion compensating optical transmission line and systemKDD CORP·Filed 2000·Granted Jul 15, 2003·27 cites·43 claims
- 0882US6460087B1Method of transferring fileKDD CORP·Filed 1999·Granted Oct 1, 2002·129 cites·20 claims
- 0981US6701373B1Data transmission apparatusKDD CORP·Filed 2000·Granted Mar 2, 2004·33 cites·12 claims
- 1080US6430224B1Stereo video data coding apparatusKDD CORP·Filed 1999·Granted Aug 6, 2002·62 cites·12 claims
- 1179US7380015B1Apparatus and method for compression-transmitting and decoding picture information and storage medium stored its control programsKDD CORP·Filed 2000·Granted May 27, 2008·16 cites·8 claims
- 1277US6976070B1Method and apparatus for automatic information filtering using URL hierarchical structure and automatic word weight learningKDD CORP·Filed 2000·Granted Dec 13, 2005·44 cites·6 claims
- 1376US7801969B2Apparatus and method for compression-transmitting and decoding picture information and storage medium stored its control programsKDD CORP·Filed 2005·Granted Sep 21, 2010·4 cites·5 claims
- 1476US6772392B1Image failure detection unit in redundant duplex transmissionKDD CORP·Filed 2000·Granted Aug 3, 2004·14 cites·12 claims
- 1576US6603505B1Device for objectively evaluating the quality of a digital transmitted pictureKDD CORP·Filed 2000·Granted Aug 5, 2003·14 cites·6 claims
- 1673US6556325B1Optical repeater monitoring system and a method thereofKDD CORP·Filed 2000·Granted Apr 29, 2003·14 cites·34 claims
- 1773US6522667B1Network interworking device for IP network / ATM networkKDD CORP·Filed 1999·Granted Feb 18, 2003·78 cites·4 claims
- 1872US6348954B1Optimum motion vector determinator and video coding apparatus using the sameKDD CORP·Filed 1999·Granted Feb 19, 2002·41 cites·7 claims
- 1970US6701164B1Mobile communication system with zone-shift control apparatusKDD CORP·Filed 2000·Granted Mar 2, 2004·14 cites·9 claims
- 2070US6546054B1Video transmission system using plural linksKDD CORP·Filed 2000·Granted Apr 8, 2003·9 cites·15 claims
- 2167US6956819B1Method, apparatus and system for evaluating quality-of-service in packet switching networkKDD CORP·Filed 2000·Granted Oct 18, 2005·11 cites·11 claims
- 2267US6870859B1Multiplexing system and multiplexing method of tributary signalsKDD CORP·Filed 2000·Granted Mar 22, 2005·9 cites·23 claims
- 2367US6118806ASignal synthesis method and apparatus under diversity receptionKDD CORP·Filed 1999·Granted Sep 12, 2000·35 cites·2 claims
- 2466US6768872B1Optical transmission system, optical transmission line and optical transmitterKDD CORP·Filed 2000·Granted Jul 27, 2004·9 cites·30 claims
- 2566US6459518B1Optical transmitting apparatusKDD CORP·Filed 1999·Granted Oct 1, 2002·33 cites·23 claims
- 2666US6188508B1Control signal superimposerKDD CORP·Filed 1999·Granted Feb 13, 2001·35 cites·13 claims
- 2764US6795401B1Band width measuring method and apparatus for a packet switching networkKDD CORP·Filed 2000·Granted Sep 21, 2004·11 cites·2 claims
- 2864US6115173AOptical amplifying transmission system and optical amplifierKDD CORP·Filed 1998·Granted Sep 5, 2000·30 cites·28 claims
- 2963US6791998B1Polling period controlling apparatusKDD CORP·Filed 1999·Granted Sep 14, 2004·51 cites·10 claims
- 3061US6393189B1Optical beam diameter reducerKDD CORP·Filed 2000·Granted May 21, 2002·7 cites·6 claims
- 3161US6377299B1Video quality abnormality detection method and apparatusKDD CORP·Filed 1999·Granted Apr 23, 2002·23 cites·5 claims
- 3260US6434288B1Optical switching systemKDD CORP·Filed 1999·Granted Aug 13, 2002·24 cites·7 claims
- 3359US7116715B2Video coding apparatus according to a feature of a video pictureKDD CORP·Filed 2002·Granted Oct 3, 2006·3 cites·8 claims
- 3458US6377375B1Optical wavelength division multiplexed signal amplifying repeater and optical communication transmission line with very large capacityKDD CORP·Filed 1999·Granted Apr 23, 2002·20 cites·24 claims
- 3555US6587435B1Apparatus for high speed communication on asymmetric lineKDD CORP·Filed 1999·Granted Jul 1, 2003·34 cites·5 claims
- 3652US6091536AOptical processing deviceKDD CORP·Filed 1998·Granted Jul 18, 2000·19 cites·16 claims
- 3750US6351649B1Mobile communication systemKDD CORP·Filed 1999·Granted Feb 26, 2002·26 cites·36 claims
- 3849US6188510B1Optical amplifying transmission system and optical amplifying repeaterKDD CORP·Filed 1999·Granted Feb 13, 2001·16 cites·14 claims
- 3946US6791951B1Connection establishment method without specifying called terminal, switched network control device and system using this methodKDD CORP·Filed 2000·Granted Sep 14, 2004·3 cites·42 claims
- 4042US6141532ATransmission line switch-over control systemKDD CORP·Filed 1998·Granted Oct 31, 2000·14 cites·12 claims
- 4141US6157098AFeed line connection circuit and optical transmission systemKDD CORP·Filed 1998·Granted Dec 5, 2000·14 cites·12 claims
- 4241US6020991AOptical amplifierKDD CORP·Filed 1998·Granted Feb 1, 2000·13 cites·8 claims
- 4340US6535515B1TCP communication speed improving systemKDD CORP·Filed 1999·Granted Mar 18, 2003·16 cites·2 claims
- 4440US6374196B1Method of fault diagnosis based on propagation modelKDD CORP·Filed 1999·Granted Apr 16, 2002·12 cites·4 claims
- 4539US6504638B1Optical amplifying transmission system and optical amplifierKDD CORP·Filed 1998·Granted Jan 7, 2003·8 cites·18 claims
- 4636US6744990B1WDM optical transmission system and an optical transmission line thereofKDD CORP·Filed 1999·Granted Jun 1, 2004·5 cites·13 claims
- 4736US6147901ASemiconductor memory operating electrically and optically, retaining information without power supplyKDD CORP·Filed 1999·Granted Nov 14, 2000·6 cites·20 claims
- 4835US6327404B1Wavelength filterKDD CORP·Filed 1999·Granted Dec 4, 2001·5 cites·10 claims
- 4931US6970467B1Transfer scheme for speech and voice band signals and ISDN digital signals using reduced transmission bandwidth over ATMKDD CORP·Filed 1999·Granted Nov 29, 2005·7 cites·14 claims
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