Granted Patent
Utility
US 4,197,693 · App. 06/008,142
Feeder housing seal
Inventors:
Richard P. Bernhardt, Robert L. Bowman, Everett C. Cowan, Jr.
Patented Case
View Patent ↗
Granted: Apr 15, 1980
Filed: Jan 31, 1979
Inventors
Richard P. Bernhardt
Robert L. Bowman
Everett C. Cowan, Jr.
Assignee (at issue)
Sperry Rand 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.