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Tsutomu Ishida
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Tokyo, JP
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last 30 patents
Information
Patent Grant
Composite photosensitive elements for use in electrophotography and...
Patent number
4,661,428
Issue date
Apr 28, 1987
Ricoh Co., Ltd.
Tsutomu Ishida
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Copying method and apparatus
Patent number
4,413,899
Issue date
Nov 8, 1983
Ricoh Company, Ltd.
Shuichi Karasawa
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Method for producing a large number of copies by means of copying a...
Patent number
4,220,699
Issue date
Sep 2, 1980
Ricoh Co., Ltd.
Tsutomu Ishida
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Method of and apparatus for transfer printing a toner image
Patent number
4,114,536
Issue date
Sep 19, 1978
Ricoh Co., Ltd.
Yutaka Kaneko
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY