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Yukihiro Yuyama
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Numazu, JP
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last 30 patents
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Patent Grant
Thermosensitive recording material having recording layer containin...
Patent number
4,950,638
Issue date
Aug 21, 1990
Ricoh Company, Ltd.
Yukihiro Yuyama
G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information
Patent Grant
Thermosensitive recording material
Patent number
4,727,054
Issue date
Feb 23, 1988
Ricoh Company, Ltd.
Yukihiro Yuyama
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Thermosensitive recording adhesive sheet
Patent number
4,711,874
Issue date
Dec 8, 1987
Ricoh Company, Ltd.
Yukihiro Yuyama
G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information
Patent Grant
Thermosensitive recording material
Patent number
4,551,738
Issue date
Nov 5, 1985
Ricoh Company, Ltd.
Keiichi Maruta
G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information
Patent Grant
Thermosensitive recording material
Patent number
4,444,819
Issue date
Apr 24, 1984
Ricoh Company, Ltd.
Keiichi Maruta
G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information
Patent Grant
Thermosensitive-recording-type label sheet
Patent number
4,424,245
Issue date
Jan 3, 1984
Ricoh Company, Ltd.
Keiichi Maruta
G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information
Patent Grant
Released heat-sensitive recording paper
Patent number
4,388,362
Issue date
Jun 14, 1983
Ricoh Co., Ltd.
Susumu Iwata
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS