John A. Bergfjord, Sr.

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Macedon, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Photoreceptor charge transport layer composition
- Patent number 7,267,917
- Issue date Sep 11, 2007
- Xerox Corporation
- Yuhua Tong
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Photoreceptor charge transport layer composition
- Patent number 7,192,678
- Issue date Mar 20, 2007
- Xerox Corporation
- Yuhua Tong
- Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Information Patent Grant
Endless belt member stress relief
- Patent number 7,182,903
- Issue date Feb 27, 2007
- Xerox Corporation
- Robert C. U. Yu
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL