Inventor · disambiguated record
Shigeki Kitajima
Also filed as: KITAJIMA SHIGEKI
23 granted patents·4 pending applications·542 citations·filing 1990–2008
96Inventor score
Top patents by PatentIndex Score
27 records- 0193US5515196AOptical intensity and phase modulators in an optical transmitter apparatusHITACHI LTD·Filed 1993·Granted May 7, 1996·158 cites·18 claims
- 0284US5323258AHomodyne optical receiver equipmentHITACHI LTD·Filed 1991·Granted Jun 21, 1994·84 cites·7 claims
- 0383US7242860B2Optical protection switching using 2 by 2 switching functionsHITACHI AMERICA LTD·Filed 2002·Granted Jul 10, 2007·19 cites·33 claims
- 0482US6933852B2Optical switching apparatus and optical communication network systemHITACHI LTD·Filed 2002·Granted Aug 23, 2005·18 cites·12 claims
- 0576US5305134AOptical frequency division multiplexing transmitter and optical frequency division multiplexing transmission apparatusHITACHI LTD·Filed 1990·Granted Apr 19, 1994·57 cites·7 claims
- 0674US6778725B1Optical switching apparatus, optical transmission system and method of setting up for optical signal routeHITACHI LTD·Filed 2002·Granted Aug 17, 2004·9 cites·13 claims
- 0774US6362905B1Optical crossconnect apparatus and optical transmission systemHITACHI LTD·Filed 1998·Granted Mar 26, 2002·36 cites·8 claims
- 0873US7356257B2Optical switching apparatus and optical communication network systemHITACHI LTD·Filed 2005·Granted Apr 8, 2008·4 cites·12 claims
- 0969US6731874B2Optical transmission apparatus and optical systemsHITACHI LTD·Filed 2002·Granted May 4, 2004·6 cites·20 claims
- 1068US6839480B2Optical switching apparatus, optical transmission system and method of setting up for optical signal routeHITACHI LTD·Filed 2003·Granted Jan 4, 2005·6 cites·2 claims
- 1168US6424445B1Optical transmission apparatus and optical systemsHITACHI LTD·Filed 1998·Granted Jul 23, 2002·26 cites·4 claims
- 1264US6813445B2Optical crossconnect apparatus and optical transmission systemHITACHI LTD·Filed 2002·Granted Nov 2, 2004·6 cites·6 claims
- 1358US2009132367A1Electronic advertisement systemHAMADA TAKUJI·Filed 2008·Application pending·0 cites
- 1457US7206475B2Optical switching apparatus, optical transmission system and method of setting up for optical signal routeHITACHI LTD·Filed 2004·Granted Apr 17, 2007·2 cites·2 claims
- 1557US5144467AOptical tuning method and apparatus suitable for selective reception of optical frequency division multiplex signalsHITACHI LTD·Filed 1990·Granted Sep 1, 1992·26 cites·12 claims
- 1654US6304346B1Fault restoration control method and it's apparatus in a communication networkHITACHI LTD·Filed 1998·Granted Oct 16, 2001·18 cites·6 claims
- 1749US7194205B2Optical transmission apparatus and optical systemsHITACHI LTD·Filed 2004·Granted Mar 20, 2007·0 cites·10 claims
- 1849US6317230B1Optical cross-connect system and optical transmission systemHITACHI LTD·Filed 1998·Granted Nov 13, 2001·14 cites·15 claims
- 1949US5761352AOptical switch having a two-level crossing between input/output optical waveguidesHITACHI LTD·Filed 1996·Granted Jun 2, 1998·13 cites·33 claims
- 2048US5515368AInformation transmission system with variable transmission rateHITACHI LTD·Filed 1994·Granted May 7, 1996·16 cites·24 claims
- 2147US7272314B2Optical crossconnect apparatus and optical transmission systemHITACHI LTD·Filed 2004·Granted Sep 18, 2007·0 cites·2 claims
- 2246US2009197571A1Authentication information registration systemKITAJIMA SHIGEKI·Filed 2008·Application pending·0 cites
- 2345US5815502AInformation transmission system with variable transmission rateHITACHI LTD·Filed 1996·Granted Sep 29, 1998·16 cites·3 claims
- 2443US2001033403A1Optical cross-connect system and optical transmission systemFiled 2001·Application pending·0 cites
- 2535US2007283255A1Character Display MethodKINA SADAYUKI·Filed 2005·Application pending·0 cites
- 2634US5576872AOptical distribution device, optical distribution circuit, and synthesizing method of distribution circuitsHITACHI LTD·Filed 1994·Granted Nov 19, 1996·6 cites·29 claims
- 2731US5790290AOptical distribution system having time switchHITACHI LTD·Filed 1997·Granted Aug 4, 1998·2 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →