Tomiko Kawakami

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Aqueous ink for ink-jet printing
- Patent number 4,508,570
- Issue date Apr 2, 1985
- Ricoh Company, Ltd.
- Tadashi Fujii
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Electrophotographic element with a phenyhydrazone charge transport...
- Patent number 4,338,388
- Issue date Jul 6, 1982
- Ricoh Company, Limited
- Kiyoshi Sakai
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Ortho-Bis (2-substituted azostyryl) benzene compounds
- Patent number 4,325,871
- Issue date Apr 20, 1982
- Ricoh Company, Ltd.
- Masaomi Sasaki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic element with carbazole hydrazone or anile charg...
- Patent number 4,297,426
- Issue date Oct 27, 1981
- Ricoh Co., Ltd.
- Kiyoshi Sakai
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Electrophotographic element having 1,4-bis(azostyryl)-2,5 dimethoxy...
- Patent number 4,268,596
- Issue date May 19, 1981
- Ricoh Company, Ltd.
- Masaomi Sasaki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic element containing a disazo pigment
- Patent number 4,247,614
- Issue date Jan 27, 1981
- Ricoh Co., Ltd.
- Masafumi Ohta
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY