Granted Patent
Utility
US 4,112,632 · App. 05/625,883
Prefabricated watertight structural system
Inventor:
Harold G. Simpson
Patented Case
View Patent ↗
Granted: Sep 12, 1978
Filed: Oct 28, 1975
Inventor
Harold G. Simpson
Assignee (at issue)
Star Manufacturing Company of Oklahoma
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.