Inventor
Kazuo Hironishi
Inventor
Kawasaki, JP
Overview
Patents· 21 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H04Bprimary
H04BTransmission36%
H04JMultiplex communication22%
G02FOptical devices or arrangements for the control of light by modification of the optical properties of the media of the elements involved therein13%
H04LTransmission of digital information, e.g. telegraphic communication11%
H04QSelecting9%
G02BOptical elements, systems or apparatus7%
H01SDevices using the process of light amplification by stimulated emission of radiation [laser] to amplify or generate light2%
PatentTitleYear
9,768,907'Optical transmission apparatus and wavelength calibration method'20179,549,233'Transmission device and optical network system'20179,503,211'Signal detection circuit and optical transmission equipment'20169,281,913'Signal detection circuit and optical transmission equipment'20169,154,233'Frequency modulation signal demodulator and light receiving apparatus'20159,054,814'Front end device and superposing signal detecting device'20158,965,221'Receiver and cross phase modulation reduction method'20158,886,057'Optical receiver, signal processor, and optical receiving method'20148,509,628'Differential multilevel modulated optical signal receiver apparatus'20137,751,721'Optical DQPSK receiver apparatus'20107,706,695'Optical DQPSK receiver apparatus'20107,631,378'Optical waveform shaper'20097,613,403'Differential multilevel modulated optical signal receiver apparatus'20097,535,616'Polarization controlling apparatus and polarization operation apparatus'20097,212,334'Optical signal-to-noise ratio improving device'20077,123,403'Optical signal-to-noise ratio improving device'20066,778,730'Optical signal processing device'20046,477,300'Method, device, and system for waveform shaping of signal light'20026,256,137'Wavelength converter'20016,072,610'Optical transmission system'20005,805,320'Cross-connect device'1998Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1998–2017Patents assigned to FUJITSU LTD (21)· patent assignee history
1998–2014Based in Kawasaki, JP· patent location history
2013–2015Patents assigned to HIRONISHI KAZUO (3)· patent assignee history
2013–2015Patents assigned to HOSHIDA TAKESHI (3)· patent assignee history
2015–2017Based in Yokohama, JP· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| FUJITSU LTD | 21 | 1998–2017 |
| HIRONISHI KAZUOself | 3 | 2013–2015 |
| HOSHIDA TAKESHI | 3 | 2013–2015 |
Locations
| Location | Patents | Span |
|---|---|---|
| Kawasaki, JP | 14 | 1998–2014 |
| Yokohama, JP | 7 | 2015–2017 |