Ken Umehara

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Chiba-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Electrostatic image developing toner, toner kit and image forming a...
- Patent number 8,007,976
- Issue date Aug 30, 2011
- Ricoh Company Ltd.
- Hideki Sugiura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrostatic image developing toner and image forming apparatus us...
- Patent number 7,718,339
- Issue date May 18, 2010
- Ricoh Company, Ltd.
- Masami Tomita
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Patents Applicationslast 30 patents

Information Patent Application
IMAGE FORMING APPARATUS, AND TONER AND DEVELOPER USED THEREIN
- Publication number 20110002719
- Publication date Jan 6, 2011
- Hyo Shu
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
ELECTROSTATIC IMAGE DEVELOPING TONER, TONER KIT AND IMAGE FORMING A...
- Publication number 20090123186
- Publication date May 14, 2009
- Hideki Sugiura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
ELECTROSTATIC IMAGE DEVELOPING TONER AND IMAGE FORMING APPARATUS US...
- Publication number 20090011356
- Publication date Jan 8, 2009
- Masami Tomita
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
IMAGE FORMING APPARATUS, AND TONER AND DEVELOPER USED THEREIN
- Publication number 20070184377
- Publication date Aug 9, 2007
- Hyo Shu
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY