IP Library › Granted Patent US 4,856,250
Granted Patent Utility
US 4,856,250 · App. 07/040,172

Sleeper for the attachment of covering material to a surface

Inventors: Arthur W. Gronau, Gregory S. Gronau
Patented Case View Patent ↗
Granted: Aug 15, 1989 Filed: Apr 17, 1987
Inventors
Arthur W. Gronau
Gregory S. Gronau

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Quick Facts
Patent No.
US 4,856,250
App. No.
07/040,172
Filed
1987-04-17
Granted
1989-08-15
Kind
A