Granted Patent
Utility
US 4,295,539 · App. 06/100,426
Auxiliary drive system
Inventors:
Richard A. Beck, Glen T. Presley
Patented Case
View Patent ↗
Granted: Oct 20, 1981
Filed: Dec 5, 1979
Inventors
Richard A. Beck
Glen T. Presley
Assignee (at issue)
Parno 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.