George F. Wilkins

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Norristown, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Roofing shingle bearing release material with identifying indicia
- Patent number 6,237,288
- Issue date May 29, 2001
- CertainTeed Corporation
- Robert L. Jenkins
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Method of providing identifying indicia to a roofing shingle
- Patent number 5,951,809
- Issue date Sep 14, 1999
- CertainTeed Corporation
- Robert L. Jenkins
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS