Ryuusaku Takahashi

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Kanagawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Novolak resin precursor, novolak resin and positive photoresist com...
- Patent number 6,417,317
- Issue date Jul 9, 2002
- Togyo Ohka Kogyo Co., Ltd.
- Ken Miyagi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Novolak resin precursor, novolak resin and positive photoresist com...
- Patent number 6,207,788
- Issue date Mar 27, 2001
- Tokyo Ohka Kogya Co., Ltd.
- Ken Miyagi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY