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last 30 patents
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Patent Grant
Optical material
Patent number
5,622,812
Issue date
Apr 22, 1997
Sanyo Electric Co., Ltd.
Fumio Tatezono
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
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Patent Grant
Optical recording material and optical recording medium employing t...
Patent number
5,443,940
Issue date
Aug 22, 1995
Sanyo Electric Co., Ltd.
Fumio Tatezono
G11 - INFORMATION STORAGE