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Kiyoshi Masui
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Saitama, JP
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last 30 patents
Information
Patent Grant
Thick film printing method
Patent number
4,479,432
Issue date
Oct 30, 1984
Toppan Printing Co., Ltd.
Tatsuo Masaki
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Electrochromic display device
Patent number
4,448,493
Issue date
May 15, 1984
Toppan Printing Co., Ltd.
Nagahisa Matsudaira
G02 - OPTICS
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Patent Grant
Method of preventing color accurate reproductions using color photo...
Patent number
4,325,981
Issue date
Apr 20, 1982
Toppan Printing Co., Ltd.
Takeo Sugiura
G07 - CHECKING-DEVICES
Information
Patent Grant
Forgery resistant document with colored areas and method for thwart...
Patent number
4,277,514
Issue date
Jul 7, 1981
Toppan Printing Co., Ltd.
Takeo Sugiura
G07 - CHECKING-DEVICES