Kazuyuki Horisawa

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Chromogenic fluoran derivatives
- Patent number 4,677,203
- Issue date Jun 30, 1987
- Shin Nisso Kako Co., Ltd.
- Masakichi Yahagi
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Fluoran compound and color forming record materials using the same
- Patent number 4,668,967
- Issue date May 26, 1987
- Shin Nisso Kako Co., Ltd.
- Masakichi Yahagi
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Chromogenic fluoran derivatives and the preparation and use thereof
- Patent number 4,410,708
- Issue date Oct 18, 1983
- Shin Nisso Kako Co., Ltd.
- Masakichi Yahagi
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS