Granted Patent
Utility
US 4,700,693 · App. 06/806,667
Endoscope steering section
Inventors:
Raymond A. Lia, Robert L. Vivenzio
Patented Case
View Patent ↗
Granted: Oct 20, 1987
Filed: Dec 9, 1985
Inventors
Raymond A. Lia
Robert L. Vivenzio
Assignee (at issue)
Welch Allyn, 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.