Granted Patent
Utility
US 4,284,285 · App. 06/036,501
Self-adjusting rotary chuck
Inventor:
Friedrich P. Futter
Patented Case
View Patent ↗
Granted: Aug 18, 1981
Filed: May 7, 1979
Inventor
Friedrich P. Futter
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.