Granted Patent
Utility
US 4,458,523 · App. 06/363,833
Cooling system pressure tester
Inventor:
Robert Moyer
Patented Case
View Patent ↗
Granted: Jul 10, 1984
Filed: Mar 31, 1982
Inventor
Robert Moyer
Assignee (at issue)
Union Carbide Corporation
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.