Hiroyuki Tohda

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Remover solution for photoresist
- Patent number 4,904,571
- Issue date Feb 27, 1990
- Tokyo Ohka Kogyo Co., Ltd.
- Tsuyoshi Miyashita
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Photopolymerizable composition including benzotriazole carboxylic acid
- Patent number 4,741,987
- Issue date May 3, 1988
- Photopoly Ohka Co., Ltd.
- Hiroyuki Tohda
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Method for providing a pattern-wise photoresist layer on a substrat...
- Patent number 4,557,996
- Issue date Dec 10, 1985
- Photopoly Ohka Co., Ltd.
- Toshimi Aoyama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Process for producing gravure printing plates
- Patent number 4,384,011
- Issue date May 17, 1983
- Dai Nippon Insatsu Kabushiki Kaisha
- Toshimi Aoyama
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS