Leonard Guan

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Wilsonville, OR, US

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Patents Grantslast 30 patents

Information Patent Grant
Method to prevent metered toner gray market leakage
- Patent number 8,066,183
- Issue date Nov 29, 2011
- Xerox Corporation
- Leonard Guan
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Method to prevent metered toner gray market leakage
- Patent number 7,677,448
- Issue date Mar 16, 2010
- Xerox Corporation
- Leonard Guan
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Fusing apparatus for a printer
- Patent number 5,761,597
- Issue date Jun 2, 1998
- Tektronix, Inc.
- Craig Smith
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents

Information Patent Application
ENABLEMENT OF MANAGED PRINT "MICRO" SERVICE FOR RETAIL OFFICE CHANNEL
- Publication number 20140201073
- Publication date Jul 17, 2014
- Xerox Corporation
- Jack Douglas Jenkins
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
METHOD TO PREVENT METERED TONER GRAY MARKET LEAKAGE
- Publication number 20100129090
- Publication date May 27, 2010
- Xerox Corporation
- Leonard Guan
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Application
Method to prevent metered toner gray market leakage
- Publication number 20060278699
- Publication date Dec 14, 2006
- Xerox Corporation.
- Leonard Guan
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS