Granted Patent
Utility
US 4,516,569 · App. 06/492,034
Intramedullary orthopaedic devices
Inventors:
David Michael Evans, Barry O. Weightman
Patented Case
View Patent ↗
Granted: May 14, 1985
Filed: May 5, 1983
Inventors
David Michael Evans
Barry O. Weightman
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT CORPORATION
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.