Tetsushi Nakano

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Fujisawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical transmission system and optical coupler/branching filter
- Patent number 6,771,854
- Issue date Aug 3, 2004
- Hitachi, Ltd.
- Tadashi Matsuoka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical transmission system and optical coupler/branching filter
- Patent number 6,563,978
- Issue date May 13, 2003
- Hitachi, Ltd.
- Tadashi Matsuoka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
ATM communication system
- Patent number 5,740,158
- Issue date Apr 14, 1998
- Hitachi, Ltd.
- Kaoru Aoki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
ATM communication system having a physical loop form with logical s...
- Patent number 5,604,729
- Issue date Feb 18, 1997
- Hitachi, Ltd.
- Kaoru Aoki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Optical transmission system and optical coupler/branching filter
- Publication number 20040197100
- Publication date Oct 7, 2004
- Hitachi, Ltd
- Tadashi Matsuoka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmission system and optical coupler/branching filter
- Publication number 20030206692
- Publication date Nov 6, 2003
- Hitachi, Ltd
- Tadashi Matsuoka
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical transmission system and optical coupler/branching filter
- Publication number 20010024544
- Publication date Sep 27, 2001
- Tadashi Matsuoka
- G02 - OPTICS