Granted Patent
Utility
US 4,193,139 · App. 05/884,786
Prosthetic finger joint
Inventor:
Peter S. Walker
Patented Case
View Patent ↗
Granted: Mar 18, 1980
Filed: Mar 8, 1978
Inventor
Peter S. Walker
Assignee (at issue)
Codman & Shurtleff, Inc.
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.