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Patent applications and USPTO patent grants for TSUCHIYA; Shohei.The latest application filed is for "copolymerized polyphenylene sulfide fibers".
Patent | Date |
---|---|
Copolymerized Polyphenylene Sulfide Fibers App 20220049380 - TSUCHIYA; Shohei ;   et al. | 2022-02-17 |
Counterfeit-proof paper for discouraging attempt at reproduction with copying device Grant 5,375,886 - Tsuchiya December 27, 1 | 1994-12-27 |
Forging-by-copying-proof prints Grant 4,944,533 - Tsuchiya July 31, 1 | 1990-07-31 |
Process for preparing film positive sheets for forging-by-copying-proof prints and prints therefrom Grant 4,780,397 - Tsuchiya October 25, 1 | 1988-10-25 |
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