Granted Patent
Utility
US 4,733,937 · App. 06/920,159
Illuminating system for endoscope or borescope
Inventors:
Raymond A. Lia, Jane Anderegg
Patented Case
View Patent ↗
Granted: Mar 29, 1988
Filed: Oct 17, 1986
Inventors
Raymond A. Lia
Jane Anderegg
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.