Thomas O. Johnstone

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Lancaster, PA, US

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Patents Grantslast 30 patents

Information Patent Grant
Security panel system
- Patent number 4,991,370
- Issue date Feb 12, 1991
- Alcan Aluminum Corporation
- J. Lynn Gailey
- E04 - BUILDING
Information Patent Grant
Ceiling or like structural system and splice member therefor
- Patent number 4,850,172
- Issue date Jul 25, 1989
- Alcan Aluminum Corporation
- J. Lynn Gailey
- E04 - BUILDING
Information Patent Grant
Method of making interlocking vinyl siding
- Patent number 4,649,008
- Issue date Mar 10, 1987
- Alcan Aluminum Corp.
- Thomas O. Johnstone
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Standing seam roof system
- Patent number 4,476,658
- Issue date Oct 16, 1984
- Alcan Aluminum Corporation
- Thomas O. Johnstone
- E04 - BUILDING