Granted Patent
Utility
US 5,052,696 · App. 07/604,703
Compact compressor seal
Inventor:
Frederick R. Hatch
Patented Case
View Patent ↗
Granted: Oct 1, 1991
Filed: Oct 26, 1990
Inventor
Frederick R. Hatch
Assignee (at issue)
Mather Seal 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.