Atsushi Takai

Person

Kodaira, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical receiver
- Patent number 9,083,470
- Issue date Jul 14, 2015
- Oclaro Japan, Inc.
- Shigehiro Takashima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical frequency division multiplexing network
- Patent number 7,127,170
- Issue date Oct 24, 2006
- Hitachi, Ltd.
- Atsushi Takai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical module connector adaptor
- Patent number 6,632,023
- Issue date Oct 14, 2003
- Sumitomo Electric Industries, Ltd.
- Shinji Ogawa
- G02 - OPTICS
Information Patent Grant
Optical frequency division multiplexing network
- Patent number 6,619,865
- Issue date Sep 16, 2003
- Hitachi, Ltd.
- Atsushi Takai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Guide pin for optical fiber connectors and optical fiber connector...
- Patent number 6,497,516
- Issue date Dec 24, 2002
- Sumitomo Electric Industries, Ltd.
- Hiroyasu Toyooka
- G02 - OPTICS
Information Patent Grant
Driving circuit of laser diode and optical transmission device
- Patent number 5,870,418
- Issue date Feb 9, 1999
- Hitachi, Ltd.
- Hajime Abe
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical frequency division multiplexing network
- Patent number 5,801,864
- Issue date Sep 1, 1998
- Hitachi, Ltd.
- Atsushi Takai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical parallel transmission device
- Patent number 5,715,339
- Issue date Feb 3, 1998
- Hitachi, Ltd.
- Atsushi Takai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Driving circuit of laser diode and optical transmission device
- Patent number 5,675,599
- Issue date Oct 7, 1997
- Hitachi, Ltd.
- Hajime Abe
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical semiconductor array module, method of fabricating the modul...
- Patent number 5,675,685
- Issue date Oct 7, 1997
- Hitachi Ltd.
- Kazuyuki Fukuda
- G02 - OPTICS
Information Patent Grant
Semiconductor optical integrated device and light receiver using sa...
- Patent number 5,574,289
- Issue date Nov 12, 1996
- Hitachi, Ltd.
- Masahiro Aoki
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Semiconductor device
- Patent number 5,567,961
- Issue date Oct 22, 1996
- Hitachi, Ltd.
- Toshiyuki Usagawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical parallel transmission device
- Patent number 5,568,576
- Issue date Oct 22, 1996
- Hitachi, Ltd.
- Atsushi Takai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method and apparatus for testing a DC coupled optical receiver
- Patent number 5,548,399
- Issue date Aug 20, 1996
- Hitachi, Ltd.
- Atsushi Takai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical frequency division multiplexing network
- Patent number 5,510,921
- Issue date Apr 23, 1996
- Hitachi, Ltd.
- Atsushi Takai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical parallel transmission device
- Patent number 5,448,661
- Issue date Sep 5, 1995
- Hitachi, Ltd.
- Atsushi Takai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Surface emitting semiconductor laser
- Patent number 5,363,393
- Issue date Nov 8, 1994
- Hitachi, Ltd.
- Kazuhisa Uomi
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Optical frequency division multiplexing network
- Patent number 5,321,540
- Issue date Jun 14, 1994
- Hitachi, Ltd.
- Atsushi Takai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
High speed logic circuit
- Patent number 5,293,084
- Issue date Mar 8, 1994
- Hitachi, Ltd.
- Hiroyuki Itoh
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Electrical circuit apparatus
- Patent number 5,263,108
- Issue date Nov 16, 1993
- Hitachi, Ltd.
- Hiroshi Kurokawa
- G02 - OPTICS
Information Patent Grant
Optical transmission paths and methods of measuring their optical t...
- Patent number 5,263,109
- Issue date Nov 16, 1993
- Hitachi, Ltd.
- Hajime Abe
- G02 - OPTICS
Information Patent Grant
Signal termination circuit
- Patent number 5,130,677
- Issue date Jul 14, 1992
- Hitachi, Ltd.
- Atsushi Takai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Two-way optical transmission system
- Patent number 4,880,289
- Issue date Nov 14, 1989
- Hitachi, Ltd.
- Katsuyuki Imoto
- G02 - OPTICS
Information Patent Grant
Ring network system for transmission of multicast information
- Patent number 4,759,015
- Issue date Jul 19, 1988
- Hitachi, Ltd. and Hitachi Microcomputer Eng. Ltd.
- Atsushi Takai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Memory driving method
- Patent number 4,308,596
- Issue date Dec 29, 1981
- Hitachi, Ltd.
- Atsushi Takai
- G11 - INFORMATION STORAGE
Information Patent Grant
Electronic tuning type television receiver
- Patent number 4,270,220
- Issue date May 26, 1981
- Hitachi, Ltd.
- Yoshimune Hagiwara
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL RECEIVER
- Publication number 20120189299
- Publication date Jul 26, 2012
- OpNext Japan, Inc.
- Shigehiro TAKASHIMA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical frequency division multiplexing network
- Publication number 20050175351
- Publication date Aug 11, 2005
- Hitachi, Ltd.
- Atsushi Takai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Clock producing circuit and semiconductor integrated circuit for co...
- Publication number 20020031148
- Publication date Mar 14, 2002
- Keiki Watanabe
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Semiconductor integrated circuit having receiving and transmitting...
- Publication number 20020021468
- Publication date Feb 21, 2002
- Takahiro Kato
- G01 - MEASURING TESTING

Atsushi Takai

Person

Patents Grantslast 30 patents

Optical receiver

Optical frequency division multiplexing network

Optical module connector adaptor

Optical frequency division multiplexing network

Guide pin for optical fiber connectors and optical fiber connector...

Driving circuit of laser diode and optical transmission device

Optical frequency division multiplexing network

Optical parallel transmission device

Driving circuit of laser diode and optical transmission device

Optical semiconductor array module, method of fabricating the modul...

Semiconductor optical integrated device and light receiver using sa...

Semiconductor device

Optical parallel transmission device

Method and apparatus for testing a DC coupled optical receiver

Optical frequency division multiplexing network

Optical parallel transmission device

Surface emitting semiconductor laser

Optical frequency division multiplexing network

High speed logic circuit

Electrical circuit apparatus

Optical transmission paths and methods of measuring their optical t...

Signal termination circuit

Two-way optical transmission system

Ring network system for transmission of multicast information

Memory driving method

Electronic tuning type television receiver

Patents Applicationslast 30 patents

OPTICAL RECEIVER

Optical frequency division multiplexing network

Clock producing circuit and semiconductor integrated circuit for co...

Semiconductor integrated circuit having receiving and transmitting...