Norman A. Johnson

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Lititz, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Small round air stream heating unit
- Patent number 4,272,668
- Issue date Jun 9, 1981
- Armstrong Cork Company
- Norman A. Johnson
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Roll-on ceiling for manufactured homes
- Patent number 4,135,341
- Issue date Jan 23, 1979
- Armstrong Cork Company
- Norman A. Johnson
- B32 - LAYERED PRODUCTS
Information Patent Grant
Back fastening of mobile home ceiling boards
- Patent number 4,033,083
- Issue date Jul 5, 1977
- Armstrong Cork Company
- Thomas W. Fritz
- E04 - BUILDING