Granted Patent
Utility
US 4,342,187 · App. 06/220,502
Resonant sickle drive with spring means at opposite ends of the sickle
Inventor:
Paul T. Shupert
Patented Case
View Patent ↗
Granted: Aug 3, 1982
Filed: Dec 29, 1980
Inventor
Paul T. Shupert
Assignee (at issue)
Allis-Chalmers 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.