Granted Patent
Utility
US 4,310,322 · App. 06/062,670
Variable speed clutch drive
Inventor:
James P. Beck
Patented Case
View Patent ↗
Granted: Jan 12, 1982
Filed: Aug 1, 1979
Inventor
James P. Beck
Assignee (at issue)
DANA LIMITED
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.