Fumikazu Ohira

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus and method for polishing a ferrule end face for an optica...
- Patent number 6,565,423
- Issue date May 20, 2003
- Nippon Telegraph and Telephone Corporation
- Kazuo Matsunaga
- B24 - GRINDING POLISHING
Information Patent Grant
Light generation method and light source
- Patent number 6,359,724
- Issue date Mar 19, 2002
- Nippon Telegraph and Telephone Corporation
- Yoshitada Katagiri
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Disk shaped tunable optical filter
- Patent number 6,157,025
- Issue date Dec 5, 2000
- Nippon Telegraph & Telephone Corporation
- Yoshitada Katagiri
- G02 - OPTICS