Granted Patent
Utility
US 5,213,112 · App. 07/827,308
Tension meter for orthopedic surgery
Inventors:
Shigeo Niwa, Mineo Sakakibara
Patented Case
View Patent ↗
Granted: May 25, 1993
Filed: Jan 29, 1992
Inventors
Shigeo Niwa
Mineo Sakakibara
Assignee (at issue)
Pfizer Hospital Products Group, 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.