Granted Patent
Utility
US 4,686,963 · App. 06/836,434
Torsion resistant vertebrated probe of simple construction
Inventors:
Jack Cohen, John Wardle
Patented Case
View Patent ↗
Granted: Aug 18, 1987
Filed: Mar 5, 1986
Inventors
Jack Cohen
John Wardle
Assignee (at issue)
Circon 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.