Granted Patent
Utility
US 5,140,263 · App. 07/800,333
System for determining position of an internal, movable conductive element
Inventor:
Robert L. Leon
Patented Case
View Patent ↗
Granted: Aug 18, 1992
Filed: Nov 27, 1991
Inventor
Robert L. Leon
Assignee (at issue)
Liberty Technology Center, 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.