Granted Patent
Utility
US 4,393,635 · App. 06/259,039
Insulated wall construction apparatus
Inventor:
Robert Long
Patented Case
View Patent ↗
Granted: Jul 19, 1983
Filed: Apr 30, 1981
Inventor
Robert Long
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.