Akira Tokoh

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Positive photo-sensitive resin composition comprising a photosensit...
- Patent number 5,449,584
- Issue date Sep 12, 1995
- Sumitomo Bakelite Company, Ltd.
- Toshio Banba
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Photosensitive resin composition and semiconductor apparatus using it
- Patent number 5,385,808
- Issue date Jan 31, 1995
- Sumitomo Bakelite Company Limited
- Akira Tokoh
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Photosensitive resin composition with polyamic acid polymer
- Patent number 5,238,784
- Issue date Aug 24, 1993
- Sumitomo Bakelite Company Limited
- Akira Tokoh
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Solvent-soluble polyimidesiloxane oligomer and process for producin...
- Patent number 5,206,337
- Issue date Apr 27, 1993
- Sumitomo Bakelite Company Limited
- Toshiro Takeda
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...