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Masaaki Imamura
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Odawara, JP
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last 30 patents
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Patent Grant
Electrophotographic photoreceptor with protruding inorganic insulat...
Patent number
5,252,418
Issue date
Oct 12, 1993
Hitachi, Ltd.
Fuminori Ishikawa
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Method of producing magnetic disk
Patent number
5,123,933
Issue date
Jun 23, 1992
Hitachi, Ltd.
Yasushi Ito
B24 - GRINDING POLISHING
Information
Patent Grant
Magnetic recording medium having a thin film magnetic layer formed...
Patent number
5,079,062
Issue date
Jan 7, 1992
Hitachi, Ltd.
Kenzo Masuda
G11 - INFORMATION STORAGE
Information
Patent Grant
Lapping member and lapping tape
Patent number
5,028,242
Issue date
Jul 2, 1991
Hitachi, Ltd.
Yasushi Ito
B24 - GRINDING POLISHING
Information
Patent Grant
Magnetic disk and method of manufacturing same
Patent number
4,844,963
Issue date
Jul 4, 1989
501 Hitachi, Ltd.
Eiichi Takasuna
G11 - INFORMATION STORAGE
Information
Patent Grant
Method of producing magnetic disk
Patent number
4,842,618
Issue date
Jun 27, 1989
Hitachi, Ltd.
Yasushi Ito
B24 - GRINDING POLISHING
Information
Patent Grant
Method of producing magnetic disk
Patent number
4,762,534
Issue date
Aug 9, 1988
Hitachi, Ltd.
Yasushi Ito
B24 - GRINDING POLISHING