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Keiji Maruta
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Kanagawa, JP
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last 30 patents
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Patent Grant
Optical disk player with disk size and pickup location responsive s...
Patent number
5,056,075
Issue date
Oct 8, 1991
Sony Corporation
Keiji Maruta
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disk apparatus compatible with different television system...
Patent number
4,914,523
Issue date
Apr 3, 1990
Sony Corp.
Keiji Maruta
G11 - INFORMATION STORAGE
Information
Patent Grant
Apparatus for reproducing selectively loaded discs of different dia...
Patent number
4,773,057
Issue date
Sep 20, 1988
Sony Corporation
Minoru Otsuka
G11 - INFORMATION STORAGE
Information
Patent Grant
Compact optical disk player including non-orthogonal optical paths
Patent number
4,751,694
Issue date
Jun 14, 1988
Sony Corporation
Takashi Naito
G11 - INFORMATION STORAGE
Information
Patent Grant
Driving apparatus for an objective lens
Patent number
4,571,026
Issue date
Feb 18, 1986
Sony Corporation
Keiji Maruta
G02 - OPTICS
Information
Patent Grant
Optical track scanner
Patent number
4,507,765
Issue date
Mar 26, 1985
Junichi Suzuki
G02 - OPTICS
Information
Patent Grant
Optical reading apparatus
Patent number
4,449,213
Issue date
May 15, 1984
Sony Corporation
Kazutaka Noborimoto
B82 - NANO-TECHNOLOGY