Granted Patent
Utility
US 6,292,221 · App. 09/193,597
Motorized focusing device and viewing system utilizing same
Inventor:
Philip R. Lichtman
Patented Case
View Patent ↗
Granted: Sep 18, 2001
Filed: Nov 17, 1998
Inventor
Philip R. Lichtman
Assignee (at issue)
Vista Medical Technologies, 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.