William S. Halligan

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East Concord, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Gypsum board grooving system
- Patent number 4,969,380
- Issue date Nov 13, 1990
- National Gypsum Company
- William S. Halligan
- B27 - WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL NAILING OR STAPLING MACH...