Duane A. Davis

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Plainfield, NJ, US

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Patents Grantslast 30 patents

Information Patent Grant
Process for the manufacture of asphalt shingles
- Patent number 4,795,661
- Issue date Jan 3, 1989
- GAF Corporation
- Alfredo A. Bondoc
- E04 - BUILDING
Information Patent Grant
Asphalt shingle
- Patent number 4,717,614
- Issue date Jan 5, 1988
- GAF Corporation
- Alfredo A. Bondoc
- E04 - BUILDING
Information Patent Grant
Double faced insulating board
- Patent number 4,351,873
- Issue date Sep 28, 1982
- GAF Corporation
- Duane A. Davis
- B32 - LAYERED PRODUCTS
Information Patent Grant
Method for perforating roofing sheet material
- Patent number 4,041,815
- Issue date Aug 16, 1977
- GAF Corporation
- Duane A. Davis
- B26 - HAND CUTTING TOOLS CUTTING SEVERING
Information Patent Grant
Apparatus for perforating roofing sheet material
- Patent number 3,983,773
- Issue date Oct 5, 1976
- GAF Corporation
- Duane A. Davis
- B26 - HAND CUTTING TOOLS CUTTING SEVERING