Katsuhisa Kamio

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Kakamigahara, JP

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Patents Grantslast 30 patents

Information Patent Grant
Reversible thermosensitive coloring composition and reversible ther...
- Patent number 6,090,192
- Issue date Jul 18, 2000
- Ricoh Company, Ltd.
- Masafumi Torii
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Reversible thermosensitive coloring composition and reversible ther...
- Patent number 5,955,225
- Issue date Sep 21, 1999
- Ricoh Company Ltd.
- Hiromi Furuya
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Reversible thermosensitive composition and reversible thermosensiti...
- Patent number 5,942,377
- Issue date Aug 24, 1999
- Ricoh Company, Ltd.
- Masafumi Torii
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Reversible thermosensitive recording medium
- Patent number 5,891,823
- Issue date Apr 6, 1999
- Ricoh Company Ltd.
- Masafumi Torii
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Thermally reversible color forming composition and thermally revers...
- Patent number 5,868,821
- Issue date Feb 9, 1999
- Richo Company, Ltd.
- Masafumi Torii
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS