Inventor
Eisaku Touma
Inventor
Kawasaki, JP
Overview
Patents· 8 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Jprimary
H04JMultiplex communication36%
H04BTransmission29%
H04LTransmission of digital information, e.g. telegraphic communication21%
H04QSelecting14%
PatentTitleYear
7,952,994'Redundancy method and switch apparatus'20117,283,742'Optical signal judging system and optical signal judging method'20077,206,512'Method of controlling optical wavelength division multiplexing transmission apparatus'20077,099,595'Optical wavelength multiplexing transmission apparatus and optical output control method for optical wavelength multiplexing transmission apparatus'20066,819,875'Optical wavelength multiplexing transmission apparatus and optical output control method for optical wavelength multiplexing transmission apparatus'20046,288,809'Optical subscriber network system'20016,288,806'Optical subscriber network system and fault supervising method for optical subscriber network system'20016,108,112'Method and apparatus for failure recovery in passive optical network'2000Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2000–2011Patents assigned to FUJITSU LTD (8)· patent assignee history
2000–2011Based in Kawasaki, JP· patent location history
2001Based in Kanagawa, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| FUJITSU LTD | 8 | 2000–2011 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kawasaki, JP | 7 | 2000–2011 |
| Kanagawa, JP | 1 | 2001 |