Granted Patent
Utility
US 4,811,539 · App. 07/115,946
Wall framing system
Inventor:
Robert J. Menchetti
Patented Case
View Patent ↗
Granted: Mar 14, 1989
Filed: Nov 2, 1987
Inventor
Robert J. Menchetti
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.