Kyohji Okada

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Shizuoka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Phenol compound, reversible thermosensitive recording medium, rever...
- Patent number 7,553,796
- Issue date Jun 30, 2009
- Ricoh Company, Ltd.
- Satoshi Yamamoto
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Phenol compound, reversible thermosensitive recording medium, rever...
- Patent number 7,456,132
- Issue date Nov 25, 2008
- Ricoh Company, Ltd.
- Satoshi Yamamoto
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Reversible thermosensitive coloring material and reversible thermos...
- Patent number 7,419,934
- Issue date Sep 2, 2008
- Ricoh Company Limited
- Satoshi Yamamoto
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS

Patents Applicationslast 30 patents

Information Patent Application
Phenol Compound, Reversible Thermosensitive Recording Medium, Rever...
- Publication number 20080242539
- Publication date Oct 2, 2008
- Satoshi Yamamoto
- C07 - ORGANIC CHEMISTRY
Information Patent Application
REVERSIBLE THERMOSENSITIVE COLORING MATERIAL AND REVERSIBLE THERMOS...
- Publication number 20070259782
- Publication date Nov 8, 2007
- Satoshi YAMAMOTO
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
Phenol Compound, Reversible Thermosensitive Recording Medium, Rever...
- Publication number 20070225161
- Publication date Sep 27, 2007
- Satoshi Yamamoto
- C07 - ORGANIC CHEMISTRY