Junji Kurokawa

Person

Yokohama, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Image forming apparatus and charging device thereof
- Patent number 5,881,344
- Issue date Mar 9, 1999
- Ricoh Company, Ltd.
- Junji Kurokawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrostatic charging roller
- Patent number 5,792,533
- Issue date Aug 11, 1998
- Ricoh Company, Ltd.
- Junji Kurokawa
- B32 - LAYERED PRODUCTS
Information Patent Grant
Charge roller for an image forming apparatus
- Patent number 5,786,091
- Issue date Jul 28, 1998
- Ricoh Company, Ltd.
- Junji Kurokawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus which maintains a temperature of a charge r...
- Patent number 5,689,770
- Issue date Nov 18, 1997
- Ricoh Company, Ltd.
- Junji Kurokawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Roller charging apparatus and image forming apparatus using the same
- Patent number 5,619,311
- Issue date Apr 8, 1997
- Ricoh Company, Ltd.
- Junji Kurokawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrifying roller, roller electrifying apparatus using the same,...
- Patent number 5,602,627
- Issue date Feb 11, 1997
- Ricoh Company, Ltd.
- Junji Kurokawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Charge roller and image forming apparatus using the same
- Patent number 5,499,078
- Issue date Mar 12, 1996
- Ricoh Company, Ltd.
- Junji Kurokawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Charge rollers having improved layer structure and/or surface chara...
- Patent number 5,497,219
- Issue date Mar 5, 1996
- Ricoh Company, Ltd.
- Junji Kurokawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and charging device thereof
- Patent number 5,479,243
- Issue date Dec 26, 1995
- Ricoh Company, Ltd.
- Junji Kurokawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Bias application control device for image forming equipment
- Patent number 5,155,533
- Issue date Oct 13, 1992
- Ricoh Company, Ltd.
- Junji Kurokawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Continuous plural page copying method for a copier
- Patent number 4,965,871
- Issue date Oct 23, 1990
- Ricoh Company, Ltd.
- Masaaki Ogura
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Color image forming method
- Patent number 4,578,331
- Issue date Mar 25, 1986
- Ricoh Company, Ltd.
- Itsuo Ikeda
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Inversion developing method for electrophotography and relevant app...
- Patent number 4,278,343
- Issue date Jul 14, 1981
- Ricoh Co., Ltd.
- Junji Kurokawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Junji Kurokawa

Person

Patents Grantslast 30 patents

Image forming apparatus and charging device thereof

Electrostatic charging roller

Charge roller for an image forming apparatus

Image forming apparatus which maintains a temperature of a charge r...

Roller charging apparatus and image forming apparatus using the same

Electrifying roller, roller electrifying apparatus using the same,...

Charge roller and image forming apparatus using the same

Charge rollers having improved layer structure and/or surface chara...

Image forming apparatus and charging device thereof

Bias application control device for image forming equipment

Continuous plural page copying method for a copier

Color image forming method

Inversion developing method for electrophotography and relevant app...