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Kiyoshi Yokomori
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Yokohama, JP
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last 30 patents
Information
Patent Grant
Opto-electric device
Patent number
5,719,981
Issue date
Feb 17, 1998
Ricoh Company, Ltd.
Ikuo Katoh
G02 - OPTICS
Information
Patent Grant
Apparatus for recording and reproducing optical information having...
Patent number
5,418,765
Issue date
May 23, 1995
Ricoh Company, Ltd.
Shigeyoshi Misawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical data recording/reproduction apparatus for use with semicond...
Patent number
5,337,302
Issue date
Aug 9, 1994
Ricoh Company, Ltd.
Hiroshi Gotoh
G11 - INFORMATION STORAGE
Information
Patent Grant
Apparatus for recording and reproducing optical information and pri...
Patent number
5,235,589
Issue date
Aug 10, 1993
Ricoh Company, Ltd.
Kiyoshi Yokomori
G02 - OPTICS
Information
Patent Grant
Mode splitter and magneto-optical signal detection device
Patent number
5,208,800
Issue date
May 4, 1993
Ricoh Company, Ltd.
Tami Isobe
G02 - OPTICS
Information
Patent Grant
High efficiency prism coupling device and method for producing the...
Patent number
5,119,452
Issue date
Jun 2, 1992
Ricoh Company, Ltd.
Kiyoshi Yokomori
G02 - OPTICS
Information
Patent Grant
Beam shaping optical system
Patent number
5,095,389
Issue date
Mar 10, 1992
Ricoh Company, Ltd.
Kiyoshi Yokomori
G02 - OPTICS
Information
Patent Grant
Waveguide type optical detection apparatus
Patent number
5,091,982
Issue date
Feb 25, 1992
Ricoh Company, Ltd.
Kiyoshi Yokomori
G02 - OPTICS
Information
Patent Grant
Optical pickup device keeping coincident the optical axes of the ob...
Patent number
5,060,214
Issue date
Oct 22, 1991
Ricoh Company, Ltd.
Masahiko Nakayama
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical waveguide device
Patent number
4,932,743
Issue date
Jun 12, 1990
Ricoh Company, Ltd.
Tami Isobe
G02 - OPTICS
Information
Patent Grant
Covered optical waveguide having an inlet opening
Patent number
4,877,301
Issue date
Oct 31, 1989
Ricoh Company, Ltd.
Kiyoshi Yokomori
G02 - OPTICS