Kenzou Tatsumi

Person

Yokohama, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Image forming apparatus with a voltage applying unit for image tran...
- Patent number 6,160,969
- Issue date Dec 12, 2000
- Ricoh Company, Ltd.
- Kouji Ishigaki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrophotographic image forming apparatus
- Patent number 6,085,062
- Issue date Jul 4, 2000
- Ricoh Company, Ltd.
- Haruji Mizuishi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus and method for obtaining appropriate toner...
- Patent number 6,055,388
- Issue date Apr 25, 2000
- Ricoh Company, Ltd.
- Shigeru Watanabe
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming method and apparatus for controlling amount of suppli...
- Patent number 6,006,050
- Issue date Dec 21, 1999
- Ricoh Company, Ltd.
- Shigeru Watanabe
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus
- Patent number 5,815,767
- Issue date Sep 29, 1998
- Ricoh Company, Ltd.
- Akio Kutsuwada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus
- Patent number 5,678,125
- Issue date Oct 14, 1997
- Ricoh Company, Ltd.
- Akio Kutsuwada
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Toner replenishing device for a developing device
- Patent number 5,557,382
- Issue date Sep 17, 1996
- Ricoh Company, Ltd.
- Kenzou Tatsumi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Kenzou Tatsumi

Person

Patents Grantslast 30 patents

Image forming apparatus with a voltage applying unit for image tran...

Electrophotographic image forming apparatus

Image forming apparatus and method for obtaining appropriate toner...

Image forming method and apparatus for controlling amount of suppli...

Image forming apparatus

Image forming apparatus

Toner replenishing device for a developing device