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Yoshihiro Utsumi
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Saitama, JP
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last 30 patents
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Patent Grant
Video disk recorder having a real-time editing function
Patent number
5,497,243
Issue date
Mar 5, 1996
Pioneer Electronic Corporation
Haruyasu Sakata
G11 - INFORMATION STORAGE
Information
Patent Grant
Laser diode drive control apparatus
Patent number
5,251,199
Issue date
Oct 5, 1993
Pioneer Electronic Corporation
Yoshihiro Utsumi
G11 - INFORMATION STORAGE
Information
Patent Grant
Disk player with improved sound during different speed video reprod...
Patent number
5,233,439
Issue date
Aug 3, 1993
Pioneer Electronic Corporation
Yoshihiro Utsumi
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Optical system in magneto-optical recording and reproducing device
Patent number
5,189,651
Issue date
Feb 23, 1993
Pioneer Electronic Corporation
Yoshihiro Utsumi
G02 - OPTICS
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Patent Grant
Optical disc with pregrooves and recording method and apparatus usi...
Patent number
5,051,836
Issue date
Sep 24, 1991
Pioneer Electronic Corporation
Fumihiko Yokogawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Opto-magnetic disk unit with improved dynamic range characteristics...
Patent number
5,034,934
Issue date
Jul 23, 1991
Pioneer Electronic Corp.
Ryuichi Naito
G11 - INFORMATION STORAGE
Information
Patent Grant
Focus error detection device
Patent number
4,631,396
Issue date
Dec 23, 1986
Pioneer Electronic Corporation
Yoshihiro Utsumi
G11 - INFORMATION STORAGE
Information
Patent Grant
Tracking servo signal generating device in an apparatus for reading...
Patent number
4,506,149
Issue date
Mar 19, 1985
Pioneer Electronic Corporation
Yoshihiro Utsumi
G11 - INFORMATION STORAGE