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Kenjiro Sakurai
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Tokyo, JP
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last 30 patents
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Patent Grant
Spherical lens for spherically symmetrical graded refractive index...
Patent number
4,557,566
Issue date
Dec 10, 1985
Agency of Industrial Science and Technology
Keisuke Kikuchi
G02 - OPTICS
Information
Patent Grant
Optical memory playback apparatus
Patent number
4,460,977
Issue date
Jul 17, 1984
Agency of Industrial Science and Technology
Junichi Shimada
G11 - INFORMATION STORAGE
Information
Patent Grant
Information processing apparatus using a semiconductor laser diode
Patent number
4,449,204
Issue date
May 15, 1984
Agency of Industrial Science and Technology
Junichi Shimada
G11 - INFORMATION STORAGE
Information
Patent Grant
Laser angular speed detector employing non-optical output
Patent number
4,431,308
Issue date
Feb 14, 1984
Seiichi Ishizaka, President of Kogyo Gijutsuin
Yoshinobu Mitsuhashi
G01 - MEASURING TESTING
Information
Patent Grant
Cladded spherical lens having uneven refractive index
Patent number
4,422,733
Issue date
Dec 27, 1983
Agency of Industrial Science and Technology
Keisuke Kikuchi
G02 - OPTICS
Information
Patent Grant
Semiconductor ring laser apparatus
Patent number
4,405,236
Issue date
Sep 20, 1983
Ishizaka; Seiichi
Yoshinobu Mitsuhashi
G01 - MEASURING TESTING
Information
Patent Grant
Optical memory playback apparatus
Patent number
4,190,775
Issue date
Feb 26, 1980
Agency of Industrial Science and Technology
Kenjiro Sakurai
G06 - COMPUTING CALCULATING COUNTING