Katsumi Kumada

Person

Ibaraki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Swing-gear mechanism and image forming apparatus having multiple sp...
- Patent number 8,417,155
- Issue date Apr 9, 2013
- Ricoh Company Limited
- Tatsuo Fukushima
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Fixing device and electro photographic apparatus using the same
- Patent number 8,131,197
- Issue date Mar 6, 2012
- Ricoh Company, Ltd.
- Chikara Hiraoka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Fixing unit and image forming apparatus having the same
- Patent number 8,073,375
- Issue date Dec 6, 2011
- Ricoh Company, Ltd.
- Chikara Hiraoka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Housing structure and image forming apparatus
- Patent number 7,983,596
- Issue date Jul 19, 2011
- Ricoh Company, Limited
- Genta Hagiwara
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing device and image forming apparatus using the same
- Patent number 7,970,311
- Issue date Jun 28, 2011
- Ricoh Company, Ltd.
- Kenji Nakamura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Rotary member, developing device, and image forming apparatus
- Patent number 7,925,193
- Issue date Apr 12, 2011
- Ricoh Company, Ltd.
- Kouichi Oomori
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus with an open-close regulation mechanism of...
- Patent number 7,804,628
- Issue date Sep 28, 2010
- Ricoh Printing Sysetms, Inc.
- Haruo Hashimoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Sheet feed cassette and image forming apparatus using the same
- Patent number 7,758,040
- Issue date Jul 20, 2010
- Ricoh Company, Ltd.
- Haruo Hashimoto
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Grant
Image forming apparatus including a wiring housing member
- Patent number 7,570,898
- Issue date Aug 4, 2009
- Ricoh Company, Ltd.
- Atsushi Onose
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electrophotographic image forming system
- Patent number 6,661,994
- Issue date Dec 9, 2003
- Hitachi, Ltd.
- Yoshio Ohuchi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Fixing device improved in offset-prevention
- Patent number 6,400,923
- Issue date Jun 4, 2002
- Hitachi, Ltd.
- Hiromitsu Fukuda
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrograph apparatus enabling removal of offensive substances
- Patent number 6,094,549
- Issue date Jul 25, 2000
- Hitachi, Ltd.
- Chikara Hiraoka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing apparatus having developing agent accommodating cartridg...
- Patent number 5,604,572
- Issue date Feb 18, 1997
- Hitachi, Ltd.
- Mitsuo Suzuki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing apparatus having developing agent accommodating cartridg...
- Patent number 5,491,537
- Issue date Feb 13, 1996
- Hitachi, Ltd.
- Mitsuo Suzuki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image fixing device and electrophotographic apparatus incorporated...
- Patent number 5,345,301
- Issue date Sep 6, 1994
- Hitachi, Ltd.
- Toshiya Satoh
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents

Information Patent Application
Swing-gear mechanism and image forming apparatus having multiple sp...
- Publication number 20110052261
- Publication date Mar 3, 2011
- Ricoh Company, Ltd.
- Tatsuo Fukushima
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Housing Structure and Image Forming Apparatus
- Publication number 20100067942
- Publication date Mar 18, 2010
- Ricoh Company, Ltd.
- Genta Hagiwara
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Fixing Unit and Image Forming Apparatus Having the Same
- Publication number 20090110448
- Publication date Apr 30, 2009
- Ricoh Printing Systems, Ltd.
- Chikara HIRAOKA
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Rotary member, developing device, and image forming apparatus
- Publication number 20090074474
- Publication date Mar 19, 2009
- Ricoh Printing Systems, Ltd.
- Kouichi Oomori
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Fixing device and electro photographic apparatus using the same
- Publication number 20080292374
- Publication date Nov 27, 2008
- Ricoh Printing Systems, Ltd.
- Chikara Hiraoka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Sheet feed cassette and image forming apparatus using the same
- Publication number 20080179818
- Publication date Jul 31, 2008
- Haruo Hashimoto
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
Information Patent Application
Developing device and image forming apparatus using the same
- Publication number 20080145094
- Publication date Jun 19, 2008
- Ricoh Printing Systems, Ltd.
- Kenji Nakamura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Image forming apparatus
- Publication number 20070047028
- Publication date Mar 1, 2007
- Ricoh Printing Systems, Ltd.
- Haruo Hashimoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Image forming apparatus
- Publication number 20070047024
- Publication date Mar 1, 2007
- ROCOH PRINTING SYSTEMS, LTD.
- Atsushi Onose
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Electrophotographic image forming system
- Publication number 20020176726
- Publication date Nov 28, 2002
- Yoshio Ohuchi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Katsumi Kumada

Person

Patents Grantslast 30 patents

Swing-gear mechanism and image forming apparatus having multiple sp...

Fixing device and electro photographic apparatus using the same

Fixing unit and image forming apparatus having the same

Housing structure and image forming apparatus

Developing device and image forming apparatus using the same

Rotary member, developing device, and image forming apparatus

Image forming apparatus with an open-close regulation mechanism of...

Sheet feed cassette and image forming apparatus using the same

Image forming apparatus including a wiring housing member

Electrophotographic image forming system

Fixing device improved in offset-prevention

Electrograph apparatus enabling removal of offensive substances

Developing apparatus having developing agent accommodating cartridg...

Developing apparatus having developing agent accommodating cartridg...

Image fixing device and electrophotographic apparatus incorporated...

Patents Applicationslast 30 patents

Swing-gear mechanism and image forming apparatus having multiple sp...

Housing Structure and Image Forming Apparatus

Fixing Unit and Image Forming Apparatus Having the Same

Rotary member, developing device, and image forming apparatus

Fixing device and electro photographic apparatus using the same

Sheet feed cassette and image forming apparatus using the same

Developing device and image forming apparatus using the same

Image forming apparatus

Image forming apparatus

Electrophotographic image forming system