Kenji Tanaka

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Tokuyama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Photochromic compound
- Patent number 5,349,065
- Issue date Sep 20, 1994
- Tokuyama Soda Kabushiki Kaisha
- Takashi Tanaka
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Photochromic compound, process for production thereof, use thereof...
- Patent number 5,130,058
- Issue date Jul 14, 1992
- Tokuyama Soda Kabushiki Kaisha
- Takashi Tanaka
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Photochromic compound, composition and use thereof
- Patent number 5,106,998
- Issue date Apr 21, 1992
- Tokuyama Soda Kabushiki Kaisha
- Takashi Tanaka
- C07 - ORGANIC CHEMISTRY