Granted Patent
Utility
US 4,915,098 · App. 07/034,023
Orthopaedic hinge mechanism
Inventors:
David E. Young, Kenneth P. Davis
Patented Case
View Patent ↗
Granted: Apr 10, 1990
Filed: Apr 3, 1987
Inventors
David E. Young
Kenneth P. Davis
Assignee (at issue)
Protectair 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.