Hiroyuki Rokugawa

Person

Sagamihara, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Light output control circuit
- Patent number 7,266,308
- Issue date Sep 4, 2007
- Fujitsu Limited
- Tadao Inoue
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Differential amplifier
- Patent number 7,119,617
- Issue date Oct 10, 2006
- Fujitsu Limited
- Hiroyuki Rokugawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Data decision circuit using clock signal which has phase optimized...
- Patent number 7,068,747
- Issue date Jun 27, 2006
- Fuijtsu Limited
- Hiroyuki Rokugawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Light output control device
- Patent number 6,975,813
- Issue date Dec 13, 2005
- Fujitsu Limited
- Tadao Inoue
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor laser driver circuit
- Patent number 6,256,329
- Issue date Jul 3, 2001
- Fujitsu Limited
- Atsuo Ishizuka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Light emitting device driving circuit
- Patent number 6,242,870
- Issue date Jun 5, 2001
- Fujitsu Limited
- Hisako Koyanagi
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Light-emitting element driving circuit and device using the same
- Patent number 6,078,150
- Issue date Jun 20, 2000
- Fujitsu Limited
- Hisako Koyanagi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Data identifying device and light receiver using the same
- Patent number 5,923,455
- Issue date Jul 13, 1999
- Fujitsu Limited
- Hiroyuki Rokugawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Semiconductor light source for an optical transmitter and an optica...
- Patent number 5,848,084
- Issue date Dec 8, 1998
- Fujitsu Limited
- Hiroyuki Rokugawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Data identifying device and light receiver using the same
- Patent number 5,796,792
- Issue date Aug 18, 1998
- Fujitsu Limited
- Hiroyuki Rokugawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Data discriminating circuit and a parallel data receiver using the...
- Patent number 5,740,210
- Issue date Apr 14, 1998
- Fujitsu Limited
- Hiroyuki Rokugawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical processing device operating in a wavelength-synchronized mo...
- Patent number 5,715,075
- Issue date Feb 3, 1998
- Fujitsu Limited
- Kazuhiro Tanaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical processing device operating in a wavelength-synchronized mo...
- Patent number 5,657,144
- Issue date Aug 12, 1997
- Fujitsu Limited
- Kazuhiro Tanaka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Data discriminating circuit and an optical receiver using the same
- Patent number 5,473,636
- Issue date Dec 5, 1995
- Fujitsu Limited
- Hiroyuki Rokugawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Integrated semiconductor laser array apparatus
- Patent number 5,337,323
- Issue date Aug 9, 1994
- Fujitsu Limited
- Hiroyuki Rokugawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Photonic switching system
- Patent number 5,274,487
- Issue date Dec 28, 1993
- Fujitsu Limited
- Nobuhiro Fujimoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical drop-and-insert apparatus
- Patent number 5,165,077
- Issue date Nov 17, 1992
- Fujitsu Limited
- Hiroyuki Rokugawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Light output control circuit
- Publication number 20060024068
- Publication date Feb 2, 2006
- FUJITSU LIMITED
- Tadao Inoue
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Differential amplifier
- Publication number 20050104661
- Publication date May 19, 2005
- Hiroyuki Rokugawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Data decision circuit using clock signal which has phase optimized...
- Publication number 20020153476
- Publication date Oct 24, 2002
- Hiroyuki Rokugawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Hiroyuki Rokugawa

Person

Patents Grantslast 30 patents

Light output control circuit

Differential amplifier

Data decision circuit using clock signal which has phase optimized...

Light output control device

Semiconductor laser driver circuit

Light emitting device driving circuit

Light-emitting element driving circuit and device using the same

Data identifying device and light receiver using the same

Semiconductor light source for an optical transmitter and an optica...

Data identifying device and light receiver using the same

Data discriminating circuit and a parallel data receiver using the...

Optical processing device operating in a wavelength-synchronized mo...

Optical processing device operating in a wavelength-synchronized mo...

Data discriminating circuit and an optical receiver using the same

Integrated semiconductor laser array apparatus

Photonic switching system

Optical drop-and-insert apparatus

Patents Applicationslast 30 patents

Light output control circuit

Differential amplifier

Data decision circuit using clock signal which has phase optimized...