Granted Patent
Utility
US 4,364,432 · App. 06/187,383
Seal assembly
Inventors:
C. Joe Bass, Elmer R. Peterson
Patented Case
View Patent ↗
Granted: Dec 21, 1982
Filed: Sep 15, 1980
Inventors
C. Joe Bass
Elmer R. Peterson
Assignee (at issue)
Hughes Tool Company LLC
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.