Granted Patent
Utility
US 4,285,070 · App. 06/160,612
Prosthetic device
Inventor:
Robert G. Averill
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Jun 18, 1980
Inventor
Robert G. Averill
Assignee (at issue)
Minnesota Mining and Manufacturing Company
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.