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Kanagawa, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Latent electrostatic image developing apparatus and image forming a...
Patent number
6,668,148
Issue date
Dec 23, 2003
Ricoh Company, Ltd.
Yasuo Hirano
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Member for developing electrostatic latent images
Patent number
RE37429
Issue date
Oct 30, 2001
Ricoh Company, Ltd.
Kazuo Nojima
428 - Stock material or miscellaneous articles
Information
Patent Grant
Image forming apparatus having an intermediate transfer unit with a...
Patent number
5,873,018
Issue date
Feb 16, 1999
Ricoh Company, Ltd.
Jun Aoto
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Electrophotograhic image forming method using an intermediate image...
Patent number
5,774,775
Issue date
Jun 30, 1998
Ricoh Company, Ltd.
Jun Aoto
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Image forming apparatus
Patent number
5,761,594
Issue date
Jun 2, 1998
Ricoh Company, Ltd.
Mitsuru Seto
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Method of developing latent electrostatic images and developer-bear...
Patent number
5,741,616
Issue date
Apr 21, 1998
Ricoh Company, Ltd.
Yasuo Hirano
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Intermediate transfer type image forming apparatus and an intermedi...
Patent number
5,655,199
Issue date
Aug 5, 1997
Ricoh Company, Ltd.
Masahide Yamashita
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Intermediate image transfer element and image forming apparatus usi...
Patent number
5,572,304
Issue date
Nov 5, 1996
Ricoh Company, Ltd.
Mitsuru Seto
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Development apparatus for developing latent electrostatic images
Patent number
5,379,097
Issue date
Jan 3, 1995
Ricoh Company, Ltd.
Jun Aoto
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developer-bearing member and image formation method using the same
Patent number
5,266,436
Issue date
Nov 30, 1993
Ricoh Company, Ltd.
Jun Aoto
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Unit for developing electrostatic latent images including member ha...
Patent number
5,168,312
Issue date
Dec 1, 1992
Ricoh Company, Ltd.
Jun Aoto
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Development unit having a toner layer thickness regulation member
Patent number
5,142,330
Issue date
Aug 25, 1992
Ricoh Company, Ltd.
Yasuo Hirano
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Developer carrier with a dielectric layer having a frequency charac...
Patent number
5,136,335
Issue date
Aug 4, 1992
Ricoh Company, Ltd.
Fuchio Takeda
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Development roller with surface layer of fluorosilicon polymer
Patent number
5,099,285
Issue date
Mar 24, 1992
Ricoh Company, Ltd.
Yasuo Hirano
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Member for developing electrostatic latent images
Patent number
4,994,319
Issue date
Feb 19, 1991
Ricoh Company, Ltd.
Kazuo Nojima
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Member for developing electrostatic latent images
Patent number
4,958,193
Issue date
Sep 18, 1990
Ricoh Company, Ltd.
Kazuo Nojima
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Developing apparatus
Patent number
4,833,058
Issue date
May 23, 1989
Ricoh Co., Ltd.
Yasuo Hirano
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Fixing roll
Patent number
4,702,964
Issue date
Oct 27, 1987
Ricoh Co., Ltd.
Yasuo Hirano
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information
Patent Grant
Fixing roll
Patent number
4,603,087
Issue date
Jul 29, 1986
Ricoh Co., Ltd.
Hideaki Ema
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Patents Applications
last 30 patents
Information
Patent Application
Developing apparatus and image forming apparatus
Publication number
20020191990
Publication date
Dec 19, 2002
Yasuo Hirano
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY