Takashi Tanaka

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Tokuyama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Spirooxazine compounds
- Patent number 5,430,146
- Issue date Jul 4, 1995
- Tokuyama Corporation
- Takashi Tanaka
- C07 - ORGANIC CHEMISTRY
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, composition and use thereof
- Patent number 5,246,989
- Issue date Sep 21, 1993
- Tokuyama Soda Kabishiki Kaisha
- Kayo Iwamoto
- 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
Information Patent Grant
Photochromic compounds
- Patent number 4,960,678
- Issue date Oct 2, 1990
- Tokuyama Soda Kabushiki Kaisha
- Takashi Tanaka
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Photochromatic compounds
- Patent number 4,882,438
- Issue date Nov 21, 1989
- Tokuyama Soda Kabushiki Kaisha
- Takashi Tanaka
- C07 - ORGANIC CHEMISTRY