Hirofumi Totsuka

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical receiver and optical transmission system
- Patent number 7,505,695
- Issue date Mar 17, 2009
- Mitsubishi Denki Kabushiki Kaisha
- Takashi Sugihara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Clock data recovery circuit
- Patent number 7,489,757
- Issue date Feb 10, 2009
- Mitsubishi Denki Kabushiki Kaisha
- Hirofumi Totsuka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transceiver, a multiplexing integrated circuit, a demultipl...
- Patent number 7,218,861
- Issue date May 15, 2007
- Mitsubishi Denki Kabushiki Kaisha
- Hirofumi Totsuka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method of and apparatus for detecting difference between the freque...
- Patent number 6,842,049
- Issue date Jan 11, 2005
- Mitsubishi Denki Kabushiki Kaisha
- Hirofumi Totsuka
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Method of and apparatus for detecting difference between frequencie...
- Patent number 6,750,682
- Issue date Jun 15, 2004
- Mitsubishi Denki Kabushiki Kaisha
- Hirofumi Totsuka
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
Clock data recovery circuit
- Publication number 20050213696
- Publication date Sep 29, 2005
- Hirofumi Totsuka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical receiver and optical transmission system
- Publication number 20050105919
- Publication date May 19, 2005
- Takashi Sugihara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method of and apparatus for detecting difference between the freque...
- Publication number 20040196070
- Publication date Oct 7, 2004
- Mitsubishi Denki Kabushiki Kaisha
- Hirofumi Totsuka
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Method of and apparatus for detecting difference between frequencie...
- Publication number 20030085739
- Publication date May 8, 2003
- Hirofumi Totsuka
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
Optical transceiver, a multiplexing integrated circuit, a demultipl...
- Publication number 20030043752
- Publication date Mar 6, 2003
- Hirofumi Totsuka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE