John F. O'Brien

Person

Webster, NY, US

People

Patents Grantslast 30 patents

Information Patent Grant
Calibration apparatus and method for charging unit of image forming...
- Patent number 7,403,728
- Issue date Jul 22, 2008
- Xerox Corporation
- Gerald M. Fletcher
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Systems and methods for setting up grid voltages in a tandem pin ch...
- Patent number 7,031,628
- Issue date Apr 18, 2006
- Xerox Corporation
- David Sekovski
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
DC pin scorotron charging apparatus, and printing machine arranged...
- Patent number 6,459,873
- Issue date Oct 1, 2002
- Xerox Corporation
- Jing Qing Song
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Reverse polarity split recharge in recharge-expose-and-develop imag...
- Patent number 5,926,674
- Issue date Jul 20, 1999
- Xerox Corporation
- Charles H. Tabb
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Single positive recharge method and apparatus for color image forma...
- Patent number 5,579,100
- Issue date Nov 26, 1996
- Xerox Corporation
- Zhao-Zhi Yu
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Magnetic transport roll for supplying toner or carrier and toner to...
- Patent number 5,010,368
- Issue date Apr 23, 1991
- Xerox Corporation
- John F. O'Brien
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Color printing machine
- Patent number 4,660,059
- Issue date Apr 21, 1987
- Xerox Corporation
- John F. O'Brien
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Duplex reproduction system employing copy sheet cleaner
- Patent number 4,131,360
- Issue date Dec 26, 1978
- Xerox Corporation
- John F. O'Brien
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Electrostatographic apparatus
- Patent number 4,023,895
- Issue date May 17, 1977
- Xerox Corporation
- John F. O'Brien
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Constant current charging device
- Patent number 3,935,517
- Issue date Jan 27, 1976
- Xerox Corporation
- John F. O'Brien
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents

Information Patent Application
Calibration apparatus and method for charging unit of image forming...
- Publication number 20070014584
- Publication date Jan 18, 2007
- XEROX CORPORATION
- Gerald M. Fletcher
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
SYSTEMS AND METHODS FOR SETTING UP GRID VOLTAGES IN A TANDEM PIN CH...
- Publication number 20050135825
- Publication date Jun 23, 2005
- XEROX Corporation
- David SEKOVSKI
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Variable open-size grid for improved charging subsystem uniformity...
- Publication number 20040081485
- Publication date Apr 29, 2004
- Xerox Corporation.
- Jing Qing Song
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

John F. O'Brien

Person

Patents Grantslast 30 patents

Calibration apparatus and method for charging unit of image forming...

Systems and methods for setting up grid voltages in a tandem pin ch...

DC pin scorotron charging apparatus, and printing machine arranged...

Reverse polarity split recharge in recharge-expose-and-develop imag...

Single positive recharge method and apparatus for color image forma...

Magnetic transport roll for supplying toner or carrier and toner to...

Color printing machine

Duplex reproduction system employing copy sheet cleaner

Electrostatographic apparatus

Constant current charging device

Patents Applicationslast 30 patents

Calibration apparatus and method for charging unit of image forming...

SYSTEMS AND METHODS FOR SETTING UP GRID VOLTAGES IN A TANDEM PIN CH...

Variable open-size grid for improved charging subsystem uniformity...