Seiichi Miyakawa

Person

Nagareyama, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Image forming device which forms an electric field to discharge an...
- Patent number 5,864,737
- Issue date Jan 26, 1999
- Ricoh Company, Ltd.
- Makoto Obu
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Wet-type image forming apparatus for forming a condensed toner image
- Patent number 5,666,616
- Issue date Sep 9, 1997
- Ricoh Company, Ltd.
- Mie Yoshino
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming apparatus having clamp for conveying a recording medium
- Patent number 5,521,679
- Issue date May 28, 1996
- Ricoh Company, Ltd.
- Seiichi Miyakawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Structure of a recording medium for an electrostatic recorder
- Patent number 5,264,273
- Issue date Nov 23, 1993
- Ricoh Company, Ltd.
- Tadahiro Suzuki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image formation method and apparatus with preheating and pressure i...
- Patent number 5,247,334
- Issue date Sep 21, 1993
- Ricoh Company, Ltd.
- Seiichi Miyakawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing apparatus using a liquid developer and having a system f...
- Patent number 5,202,534
- Issue date Apr 13, 1993
- Ricoh Company, Ltd.
- Yoshiumi Tamiya
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Image forming equipment with variable stepwise drive means operation
- Patent number 5,172,180
- Issue date Dec 15, 1992
- Ricoh Company, Ltd.
- Kiyoshi Ohshima
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Solid state charger
- Patent number 4,811,158
- Issue date Mar 7, 1989
- Ricoh Company, Ltd.
- Yasuyuki Kani
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Flat solid discharging device
- Patent number 4,803,593
- Issue date Feb 7, 1989
- Ricoh Company, Ltd.
- Kazuyoshi Matsumoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Developing device
- Patent number 4,669,859
- Issue date Jun 2, 1987
- Ricoh Company, Ltd.
- Manabu Mochizuki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Method and apparatus for detecting toner concentration of two-compo...
- Patent number 4,640,129
- Issue date Feb 3, 1987
- Seiichi Miyakawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Method of maintaining the correct conditions of an electrophotograp...
- Patent number RE32330
- Issue date Jan 13, 1987
- Ricoh Co., Ltd.
- Seiichi Miyakawa
- 355 - Photocopying
Information Patent Grant
Method and apparatus for electrically biasing developing electrode...
- Patent number RE31707
- Issue date Oct 16, 1984
- Ricoh Company, Ltd.
- Seiichi Miyakawa
- 355 - Photocopying
Information Patent Grant
Developing unit for electrophotography
- Patent number 4,423,134
- Issue date Dec 27, 1983
- Ricoh Company, Ltd.
- Seiichi Miyakawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Development apparatus
- Patent number 4,382,420
- Issue date May 10, 1983
- Ricoh Company, Ltd.
- Teruyuki Ohnuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Reverse development method
- Patent number 4,350,749
- Issue date Sep 21, 1982
- Ricoh Company Ltd.
- Teruyuki Ohnuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrostatic copying apparatus
- Patent number 4,310,238
- Issue date Jan 12, 1982
- Ricoh Company, Ltd.
- Manabu Mochizuki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Exposure control and other component control for electrostatic copy...
- Patent number 4,306,804
- Issue date Dec 22, 1981
- Ricoh Company, Ltd.
- Koji Sakamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Apparatus for developing electrostatic image
- Patent number 4,286,543
- Issue date Sep 1, 1981
- Ricoh Company, Ltd.
- Teruyuki Ohnuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrostatic apparatus for multi-image formation
- Patent number 4,251,152
- Issue date Feb 17, 1981
- Ricoh Company, Ltd.
- Seiichi Miyakawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Auto document feeder for use with duplex copying machine
- Patent number 4,231,561
- Issue date Nov 4, 1980
- Ricoh Company, Ltd.
- Tamaki Kaneko
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrostatic copying machine
- Patent number 4,226,525
- Issue date Oct 7, 1980
- Ricoh Company, Ltd.
- Koji Sakamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Method for controlling a copying apparatus adapted to print images...
- Patent number 4,218,130
- Issue date Aug 19, 1980
- Ricoh Co., Ltd.
- Toyokazu Satomi
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Method of maintaining the correct conditions of an electrophotograp...
- Patent number 4,215,930
- Issue date Aug 5, 1980
- Ricoh Company, Limited
- Seiichi Miyakawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Apparatus for sensing toner density using a stationary ferromagneti...
- Patent number 4,210,864
- Issue date Jul 1, 1980
- Ricoh Company, Ltd.
- Seiichi Miyakawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Development apparatus
- Patent number 4,194,830
- Issue date Mar 25, 1980
- Ricoh Company, Ltd.
- Teruyuki Ohnuma
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Apparatus for sensing deterioration of developing substance includi...
- Patent number 4,195,260
- Issue date Mar 25, 1980
- Ricoh Company, Ltd.
- Koji Sakamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Auto-bias developing process and an electrophotographic copying mac...
- Patent number 4,168,329
- Issue date Sep 18, 1979
- Ricoh Co., Ltd.
- Seiichi Miyakawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Device for detecting a toner concentration in a developing solution
- Patent number 4,166,702
- Issue date Sep 4, 1979
- Ricoh Company, Ltd.
- Toyoo Okamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Drum cleaning system for electrophotographic apparatus
- Patent number 4,165,172
- Issue date Aug 21, 1979
- Ricoh Co., Ltd.
- Toyoo Okamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Seiichi Miyakawa

Person

Patents Grantslast 30 patents

Image forming device which forms an electric field to discharge an...

Wet-type image forming apparatus for forming a condensed toner image

Image forming apparatus having clamp for conveying a recording medium

Structure of a recording medium for an electrostatic recorder

Image formation method and apparatus with preheating and pressure i...

Developing apparatus using a liquid developer and having a system f...

Image forming equipment with variable stepwise drive means operation

Solid state charger

Flat solid discharging device

Developing device

Method and apparatus for detecting toner concentration of two-compo...

Method of maintaining the correct conditions of an electrophotograp...

Method and apparatus for electrically biasing developing electrode...

Developing unit for electrophotography

Development apparatus

Reverse development method

Electrostatic copying apparatus

Exposure control and other component control for electrostatic copy...

Apparatus for developing electrostatic image

Electrostatic apparatus for multi-image formation

Auto document feeder for use with duplex copying machine

Electrostatic copying machine

Method for controlling a copying apparatus adapted to print images...

Method of maintaining the correct conditions of an electrophotograp...

Apparatus for sensing toner density using a stationary ferromagneti...

Development apparatus

Apparatus for sensing deterioration of developing substance includi...

Auto-bias developing process and an electrophotographic copying mac...

Device for detecting a toner concentration in a developing solution

Drum cleaning system for electrophotographic apparatus