Shinji Yoshinaka

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Iwatsuki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Fluoran compounds and color forming recording materials using same
- Patent number 4,954,631
- Issue date Sep 4, 1990
- Shin Nisso Kako Co., Ltd.
- Takeo Obitsu
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Fluoran compounds and color forming recording materials using same
- Patent number 4,826,806
- Issue date May 2, 1989
- Shin Nisso Kako Co., Ltd.
- Takeo Obitsu
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Spirobenzanthracene phthalide compounds, processes for preparing sa...
- Patent number 4,794,069
- Issue date Dec 27, 1988
- Shin Nisso Kako Co., Ltd.
- Yutaka Ohnishi
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Addition compound of fluoran compounds and ketone
- Patent number 4,695,640
- Issue date Sep 22, 1987
- Shin Nisso Kako Co., Ltd.
- Masakichi Yahagi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
4-hydroxy-4'-isopropoxydiphenylsulfone and its use for color-develo...
- Patent number 4,616,239
- Issue date Oct 7, 1986
- Shin Nisso Kako Co., Ltd.
- Masakichi Yahagi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
4-Hydroxy-4'-isopropoxydiphenylsulfone and its use for color-develo...
- Patent number 4,568,766
- Issue date Feb 4, 1986
- Nippon Soda Company Limited
- Masakichi Yahagi
- C07 - ORGANIC CHEMISTRY