IP Library › Granted Patent US 5,100,274
Granted Patent Utility
US 5,100,274 · App. 07/739,308

Roofing fastener and improved screw therefor

Inventors: Syed R. Hasan, Michael P. Ditka
Patented Case View Patent ↗
Granted: Mar 31, 1992 Filed: Aug 1, 1991
Inventors
Syed R. Hasan
Michael P. Ditka
Assignee (at issue)
ILLINOIS TOOL WORKS INC.

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Quick Facts
Patent No.
US 5,100,274
App. No.
07/739,308
Filed
1991-08-01
Granted
1992-03-31
Kind
A