Granted Patent
Utility
US 4,496,015 · App. 06/412,428
Interchangeable drive means for a vehicle
Inventors:
James A. Porter, Joe D. Shivers, Marek L. Rozycki, Otis A. Johnston
Patented Case
View Patent ↗
Granted: Jan 29, 1985
Filed: Aug 30, 1982
Inventors
James A. Porter
Joe D. Shivers
Marek L. Rozycki
Otis A. Johnston
Assignee (at issue)
Litton Resources Systems, Inc.
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.