Seimei Yasui

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Takarazuka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical foam-spacer disk assembly
- Patent number 4,870,429
- Issue date Sep 26, 1989
- Sumitomo Chemical Company, Limited
- Tsutomu Fujita
- G11 - INFORMATION STORAGE
Information Patent Grant
Positive type high gamma-value photoresist composition with novolak...
- Patent number 4,863,829
- Issue date Sep 5, 1989
- Sumitomo Chemical Company, Limited
- Akihiro Furuta
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Positive photoresist composition with m-hydroxy-.alpha.-methylstyre...
- Patent number 4,696,886
- Issue date Sep 29, 1987
- Sumitomo Chemical Company, Limited
- Makoto Hanabata
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY