Kenji Uematsu

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Numazu, JP

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Patents Grantslast 30 patents

Information Patent Grant
Thermosensitive recording material having recording layer containin...
- Patent number 4,950,638
- Issue date Aug 21, 1990
- Ricoh Company, Ltd.
- Yukihiro Yuyama
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Thermosensitive recording material
- Patent number 4,663,642
- Issue date May 5, 1987
- Ricoh Company, Ltd.
- Naomi Kameda
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS