Inventor · disambiguated record
Hirofumi Shimomura
Also filed as: SHIMOMURA HIROFUMI
11 granted patents·1 pending application·309 citations·filing 1998–2003
92Inventor score
Files withNEC CORP11
Top patents by PatentIndex Score
12 records- 0193US6657952B1Ring network for sharing protection resource by working communication pathsNEC CORP·Filed 1998·Granted Dec 2, 2003·109 cites·18 claims
- 0287US7280470B2Ring network for sharing protection resource by working communication pathsNEC CORP·Filed 2003·Granted Oct 9, 2007·23 cites·6 claims
- 0387US6404525B1Optical add-drop multiplexerNEC CORP·Filed 1998·Granted Jun 11, 2002·73 cites·10 claims
- 0482US6347168B1Optical switch and optical switch systemNEC CORP·Filed 2000·Granted Feb 12, 2002·21 cites·29 claims
- 0573US6895183B2Optical add-drop multiplexerNEC CORP·Filed 2002·Granted May 17, 2005·9 cites·13 claims
- 0669US7197246B2Optical switch, optical amplifier and optical power controller as well as optical add-drop multiplexerNEC CORP·Filed 2002·Granted Mar 27, 2007·6 cites·28 claims
- 0765US6400498B1Optical signal repeating and amplifying device and optical level adjusting deviceNEC CORP·Filed 1998·Granted Jun 4, 2002·29 cites·13 claims
- 0862US6466344B2Optical switch, optical amplifier and optical power controller as well as optical add-drop multiplexerNEC CORP·Filed 2001·Granted Oct 15, 2002·5 cites·9 claims
- 0954US6809846B2Optical switch and optical networkNEC CORP·Filed 2003·Granted Oct 26, 2004·2 cites·36 claims
- 1054US6538779B1Optical signal monitoring method and apparatusNEC CORP·Filed 1999·Granted Mar 25, 2003·30 cites·15 claims
- 1144US2002126372A1Optical signal repeating and amplifying device and optical level adjusting deviceFiled 2002·Application pending·0 cites
- 1235US6424440B1Optical switch, optical amplifier and optical power controller as well as optical add-drop multiplexerNEC CORP·Filed 1998·Granted Jul 23, 2002·2 cites·12 claims
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