Granted Patent
Utility
US 4,324,079 · App. 06/066,625
Cornerbead and corner clip
Inventor:
Robert J. Pearson
Patented Case
View Patent ↗
Granted: Apr 13, 1982
Filed: Aug 15, 1979
Inventor
Robert J. Pearson
Assignee (at issue)
National Gypsum Company
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.