Inventor
Tetsuya Kiyonaga
Inventor
Kawasaki, JP
Overview
Patents· 20 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Bprimary
H04BTransmission45%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light13%
H04LTransmission of digital information, e.g. telegraphic communication13%
H04JMultiplex communication10%
H03KPulse technique3%
H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses3%
H03MCoding3%
H05KPrinted circuits3%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h103%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests3%
PatentTitleYear
7,215,894'Optical transmitter device'20077,031,621'Optical receiving device'20066,643,472'APD bias circuit'20036,594,070'Optical communication system, optical receiver and wavelength converter'20036,590,686'Optical transmitter'20036,501,774'Optical transmission apparatus for multiple wavelengths and optical transmission wavelength control method'20026,483,625'WDM optical transmission apparatus'20026,282,098'Electronic circuit module, electronic circuit module connecting structure and connecting member, and method for connecting the same'20016,229,833'Laser diode protecting circuit and laser driving current control circuit'20016,188,738'Clock extraction circuit'20016,097,746'Laser diode protecting circuit'20006,065,129'Clock signal detection circuit'20005,808,571'Synchronization control unit which maintains synchronization between serial-to-parallel converters operating in parallel, or between parallel-to-serial converters operating in parallel'19985,652,767'Data decision circuit used in optical parallel receiving module, optical parallel receiving module, optical parallel transmission system and terminal structure of optical transmission fiber'19975,253,097'Demodulator and a polarization diversity receiver for coherent optical communication provided with the demodulator'19935,115,332'Receiver for coherent optical communication'19925,052,051'Heterodyne receiver for coherent optical communication'19915,050,176'Direct modulation phase-shift-keying system and method'19915,003,626'Dual balanced optical signal receiver'19914,965,858'Polarization diversity optical receiver for coherent optical communication'1990Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1990–2007Patents assigned to FUJITSU LTD (20)· patent assignee history
1990–2007Based in Kawasaki, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| FUJITSU LTD | 20 | 1990–2007 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kawasaki, JP | 20 | 1990–2007 |