Inventor · disambiguated record
Tatsuya Shiragaki
Also filed as: SHIRAGAKI TATSUYA
16 granted patents·3 pending applications·821 citations·filing 1994–2018
95Inventor score
Top patents by PatentIndex Score
19 records- 0193US6657952B1Ring network for sharing protection resource by working communication pathsNEC CORP·Filed 1998·Granted Dec 2, 2003·109 cites·18 claims
- 0293US5457556AOptical cross-connect system with space and wavelength division switching stages for minimizing fault recovery proceduresNEC CORP·Filed 1994·Granted Oct 10, 1995·208 cites·13 claims
- 0390US6115517AOptical communication network apparatus and optical switching networkNEC CORP·Filed 1998·Granted Sep 5, 2000·92 cites·12 claims
- 0487US7280470B2Ring network for sharing protection resource by working communication pathsNEC CORP·Filed 2003·Granted Oct 9, 2007·23 cites·6 claims
- 0584US6785473B1WDM network and WDM network deviceNEC CORP·Filed 2000·Granted Aug 31, 2004·22 cites·5 claims
- 0684US5663820AOptical network using multiplexed payload and OAM signalsNEC CORP·Filed 1995·Granted Sep 2, 1997·84 cites·12 claims
- 0777US5757526AOptical communication network and method for optically detecting a faultNEC CORP·Filed 1996·Granted May 26, 1998·54 cites·30 claims
- 0870US6023452ANetwork failure restoration method with different recovery performances for different signal groupsNEC CORP·Filed 1997·Granted Feb 8, 2000·71 cites·10 claims
- 0970US5471332AHitless switching apparatus and method for optical networkNEC CORP·Filed 1994·Granted Nov 28, 1995·59 cites·29 claims
- 1067US6128115AOptical switch deviceNEC CORP·Filed 1998·Granted Oct 3, 2000·36 cites·16 claims
- 1158US7043662B2Communication device that performs automatic failure recovery and automatic failure recovery methodNEC CORP·Filed 2002·Granted May 9, 2006·5 cites·34 claims
- 1254US7515545B2Signal repeater and switching device, method of detecting connecting relation between signal repeater and switching device and communication systemNEC CORP·Filed 2004·Granted Apr 7, 2009·2 cites·10 claims
- 1354US6538779B1Optical signal monitoring method and apparatusNEC CORP·Filed 1999·Granted Mar 25, 2003·30 cites·15 claims
- 1454US6125104ANetwork node for switching quality detector to incoming signal specified by request message from adjacent nodeNEC CORP·Filed 1997·Granted Sep 26, 2000·18 cites·13 claims
- 1550US8886013B2Device and method for preventing unauthorized reproduction of contentSHIRAGAKI TATSUYA·Filed 2009·Granted Nov 11, 2014·0 cites·18 claims
- 1641US2010021130A1Method and device for receiving and reproducing contentSHIRAGAKI TATSUYA·Filed 2009·Application pending·0 cites
- 1741US2010023974A1Method and device for receiving content in a content delivery systemSHIRAGAKI TATSUYA·Filed 2009·Application pending·0 cites
- 1841US2018262967A1Control apparatus, method, a non-transitory computer readable medium storing a programNEC CORP·Filed 2018·Application pending·0 cites
- 1937US6211983B1Optical communication network unit comprising an optical signal converting apparatus and/or an optical signal receiving apparatusNEC CORP·Filed 1998·Granted Apr 3, 2001·8 cites·23 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →