Keiichi Ishiyama

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method for polishing optical fiber end surface
- Patent number 5,743,787
- Issue date Apr 28, 1998
- Seiko Instruments Inc.
- Keiichi Ishiyama
- B24 - GRINDING POLISHING
Information Patent Grant
Method of polishing the end face of a ferrule on an optical connector
- Patent number 5,667,426
- Issue date Sep 16, 1997
- Seiko Instruments Inc.
- Kohji Minami
- G02 - OPTICS
Information Patent Grant
Capsule rupture printing system
- Patent number 4,796,036
- Issue date Jan 3, 1989
- Seiko Instruments Inc.
- Shigemi Misono
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Color printing system
- Patent number 4,748,475
- Issue date May 31, 1988
- Seiko Instruments Inc.
- Keiichi Ishiyama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY