Inventor
Koji Takeguchi
Inventor
Kawasaki, JP
Overview
Patents· 26 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Jprimary
H04JMultiplex communication56%
H04LTransmission of digital information, e.g. telegraphic communication19%
H04QSelecting17%
H04BTransmission6%
G02BOptical elements, systems or apparatus3%
PatentTitleYear
9,703,053'Optical transceiver'20179,515,848'Transmission device, transmission system, and transmission method'20169,264,167'Optical add drop multiplexer'20169,197,347'Optical transmission system and noise suppression method'20159,154,373'Failure protection method and node apparatus'20158,977,130'Optical transmission device and optical filter circuit'20158,965,197'Method of switching optical transport network and node device'20158,681,785'Communication apparatus and path setting control method'20148,320,278'Communication device, system and method to form communication route'20127,970,278'Flexible open ring optical network and method'20117,957,644'Flexible open ring optical network and method'20117,957,429'Transmission system'20117,548,693'Relay transmission apparatus'20097,283,739'Multiple subnets in an optical ring network and method'20077,283,740'Optical ring network with optical subnets and method'20077,266,294'Coupler-based optical cross-connect'20077,239,649'Transmission system'20077,231,148'Flexible open ring optical network and method'20077,200,332'System and method for assigning traffic to wavelengths in optical networks'20077,184,663'Optical ring network with hub node and method'20077,116,905'Method and system for control signaling in an open ring optical network'20067,076,163'Method and system for testing during operation of an open ring optical network'20067,024,121'Optical clock signal distribution system in WDM network'20066,842,562'Optical add/drop node and method'20056,735,171'SDH transmission system, SDH transmission equipment and line switching control method in SDH transmission system'20046,567,422'Network synchronization controller and timing loop prevention method'2003Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2003–2016Patents assigned to FUJITSU LTD (24)· patent assignee history
2003–2016Based in Kawasaki, JP· patent location history
2005–2011Based in Richardson, TX, US· patent location history
2006Based in Richardon, TX, US· patent location history
2007–2017Based in Kanagawa, JP· patent location history
2012–2016Patents assigned to TAKEGUCHI KOJI (6)· patent assignee history
2012–2015Patents assigned to SHIRAI KATSUHIRO (4)· patent assignee history
2012–2015Patents assigned to NOZU YASUKO (2)· patent assignee history
2015–2016Patents assigned to TAKATSU KAZUO (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| FUJITSU LTD | 24 | 2003–2016 |
| TAKEGUCHI KOJIself | 6 | 2012–2016 |
| SHIRAI KATSUHIRO | 4 | 2012–2015 |
| NOZU YASUKO | 2 | 2012–2015 |
| TAKATSU KAZUO | 2 | 2015–2016 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kawasaki, JP | 13 | 2003–2016 |
| Richardson, Texas, US | 9 | 2005–2011 |
| Kanagawa, JP | 3 | 2007–2017 |
| Richardon, Texas, US | 1 | 2006 |