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Hachioji, JP
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last 30 patents
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Patent Grant
Opto-magnetic pick-up device including phase difference correcting...
Patent number
5,249,171
Issue date
Sep 28, 1993
Olympus Optical Company Ltd.
Nobuhide Matsubayashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical information recording and reproducing apparatus
Patent number
4,890,274
Issue date
Dec 26, 1989
Olympus Optical Co., Ltd.
Nobuyuki Kaneko
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for detecting track crossings on an optical disc
Patent number
4,757,487
Issue date
Jul 12, 1988
Olympus Optical Company Limited
Tsuneo Yanagida
G11 - INFORMATION STORAGE
Information
Patent Grant
Photomagnetic differential reproducing system
Patent number
4,682,311
Issue date
Jul 21, 1987
Olympus Optical Co., Ltd.
Nobuhide Matsubayashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disk apparatus with beam energy correction for deviations i...
Patent number
4,631,712
Issue date
Dec 23, 1986
Olympus Optical Co., Ltd.
Nobuhide Matsubayashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical memory device
Patent number
4,621,352
Issue date
Nov 4, 1986
Olympus Optical Co., Ltd.
Kiichi Kato
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical recording/reproducing apparatus
Patent number
4,607,359
Issue date
Aug 19, 1986
Olympus Optical Co., Ltd.
Nobuhide Matsubayashi
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Information
Patent Grant
Apparatus for recording and reproducing information on an optical disc
Patent number
4,574,371
Issue date
Mar 4, 1986
Olympus Optical Company Limited
Haruhiko Takemura
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Information
Patent Grant
Optical memory device with means for detecting erroneous data writing
Patent number
4,554,654
Issue date
Nov 19, 1985
Olympus Optical Co. Ltd.
Kiichi Kato
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Information
Patent Grant
Optical system for synthesizing plural light beams
Patent number
4,545,651
Issue date
Oct 8, 1985
Olympus Optical Co., Ltd.
Kiichi Kato
G02 - OPTICS
Information
Patent Grant
Method and apparatus for detecting focussing and tracking error sig...
Patent number
4,525,825
Issue date
Jun 25, 1985
Olympus Optical Co., Ltd.
Kenichi Ito
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Information
Patent Grant
Apparatus for detecting input signal
Patent number
4,520,280
Issue date
May 28, 1985
Olympus Optical Company Limited
Shozi Yoshikawa
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Light beam separation method
Patent number
4,509,830
Issue date
Apr 9, 1985
Olympus Optical Co., Ltd.
Kiichi Kato
G02 - OPTICS
Information
Patent Grant
Optical information recording and/or reproducing apparatus and opti...
Patent number
4,507,763
Issue date
Mar 26, 1985
Olympus Optical Co., Ltd.
Kiichi Kato
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for detecting focussing error signal of object...
Patent number
4,505,584
Issue date
Mar 19, 1985
Olympus Optical Co., Ltd.
Kiichi Kato
G02 - OPTICS
Information
Patent Grant
System for detecting defects on an optical surface
Patent number
4,505,585
Issue date
Mar 19, 1985
Olympus Optical Co., Ltd.
Shoji Yoshikawa
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Information
Patent Grant
Disc drive apparatus
Patent number
4,499,514
Issue date
Feb 12, 1985
Olympus Optical Co., Ltd.
Kunio Yamamiya
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Information
Patent Grant
Method for reading information or defect out of rotating disc
Patent number
4,499,572
Issue date
Feb 12, 1985
Olympus Optical Co., Ltd.
Shozi Yoshikawa
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Information
Patent Grant
System for focusing an optical head onto a flat surface
Patent number
4,495,407
Issue date
Jan 22, 1985
Olympus Optical Co., Ltd.
Hiroshi Kodama
G02 - OPTICS
Information
Patent Grant
Method of processing information signal with respect to opto-magnet...
Patent number
4,472,748
Issue date
Sep 18, 1984
Olympus Optical Co. Ltd.
Kiichi Kato
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Information
Patent Grant
Apparatus for detecting optically defects
Patent number
4,464,050
Issue date
Aug 7, 1984
Olympus Optical Co., Ltd.
Kiichi Kato
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for detecting a focussing condition of an obje...
Patent number
4,455,085
Issue date
Jun 19, 1984
Olympus Optical Co. Ltd.
Kiichi Kato
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for controlling the focusing and tracking of a...
Patent number
4,453,239
Issue date
Jun 5, 1984
Olympus Optical Company, Ltd.
Tohru Musha
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Information
Patent Grant
Information reproducing apparatus based on opto-magnetic effect
Patent number
4,451,863
Issue date
May 29, 1984
Olympus Optical Company Limited
Tuneo Yanagida
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Information
Patent Grant
Method and apparatus for reproducing optically an information recor...
Patent number
4,425,636
Issue date
Jan 10, 1984
Olympus Optical Co. Ltd.
Tohru Musha
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for recording optically an information signal...
Patent number
4,423,495
Issue date
Dec 27, 1983
Olympus Optical Co., Ltd.
Tohru Musha
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for detecting a focussing condition of an obje...
Patent number
4,422,168
Issue date
Dec 20, 1983
Olympus Optical Co. Ltd.
Kenichi Ito
G11 - INFORMATION STORAGE