Yasuto Koyama

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Tokyo, JA

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Patents Grantslast 30 patents

Information Patent Grant
3,7,11,11-Tetramethyl-spiro-[5,5]undeca-8-ene-1-one
- Patent number 4,052,457
- Issue date Oct 4, 1977
- Takasago Perfumery Co., Ltd.
- Akira Nagakura
- C07 - ORGANIC CHEMISTRY