Harold N. Graybeal

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Lancaster, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Fabric-covered board structure and process of manufacture
- Patent number 5,601,896
- Issue date Feb 11, 1997
- Armstrong World Industries, Inc.
- Darryl C. Bodine
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method of making a positioned chip surface covering
- Patent number 4,761,306
- Issue date Aug 2, 1988
- Armstrong World Industries, Inc.
- Lawrence Clark
- B44 - DECORATIVE ARTS
Information Patent Grant
Rotary screen squeegee rod
- Patent number 4,414,915
- Issue date Nov 15, 1983
- Armstrong World Industries, Inc.
- Harold N. Graybeal
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS