Kyugo Tanaka

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Coloring method and color-forming material
- Patent number 4,521,793
- Issue date Jun 4, 1985
- Asahi Kasei Kogyo Kabushiki Kaisha
- Kazuo Kabashima
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Carboxamide type azomethine pigment
- Patent number 4,318,850
- Issue date Mar 9, 1982
- Asahi Kasei Kogyo Kabushiki Kaisha
- Fumihiko Yamamoto
- C07 - ORGANIC CHEMISTRY