Richard D. Hebert

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San Jose, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Electrophotographic copying apparatus including transfer charge cor...
- Patent number 4,575,216
- Issue date Mar 11, 1986
- Ricoh Company, Ltd.
- Richard D. Hebert
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Polarizing filters for enhancing contrast in xerographic copying ma...
- Patent number 4,416,530
- Issue date Nov 22, 1983
- Ricoh Company, Ltd.
- Richard D. Hebert
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY