Granted Patent
Utility
US 4,557,710 · App. 06/584,234
Clutch controlled drive unit
Inventor:
C. Austin Greider
Patented Case
View Patent ↗
Granted: Dec 10, 1985
Filed: Feb 27, 1984
Inventor
C. Austin Greider
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.