Granted Patent
Utility
US 4,704,837 · App. 06/896,967
Wall construction
Inventors:
Robert J. Menchetti, Robert M. Chapman
Patented Case
View Patent ↗
Granted: Nov 10, 1987
Filed: Aug 15, 1986
Inventors
Robert J. Menchetti
Robert M. Chapman
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.