Granted Patent
Utility
US 4,388,920 · App. 06/314,900
Variable position knee immobilizer
Inventors:
Mark J. Hajost, Robert L. Crevling, Jr., Fred B. Powell
Patented Case
View Patent ↗
Granted: Jun 21, 1983
Filed: Oct 26, 1981
Inventors
Mark J. Hajost
Robert L. Crevling, Jr.
Fred B. Powell
Assignee (at issue)
Professional Medical Products, 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.