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Yoichi Tokunaga
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Mito, JP
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Patents Grants
last 30 patents
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Patent Grant
Video signal play-back circuit
Patent number
RE32132
Issue date
Apr 29, 1986
Hitachi, Ltd.
Hisashi Nakamura
360 - Dynamic magnetic information storage or retrieval
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Patent Grant
Servo circuit for rotary heads of a video tape recorder
Patent number
4,268,873
Issue date
May 19, 1981
Hitachi, Ltd.
Yasunori Kobori
G11 - INFORMATION STORAGE
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Patent Grant
Video signal play-back circuit
Patent number
4,210,942
Issue date
Jul 1, 1980
Hitachi, Ltd.
Hisashi Nakamura
G11 - INFORMATION STORAGE