Granted Patent
Utility
US 4,833,440 · App. 07/249,218
Conductive elastomers in potentiometers & rheostats
Inventor:
Guy A. Wojtanek
Patented Case
View Patent ↗
Granted: May 23, 1989
Filed: Sep 26, 1988
Inventor
Guy A. Wojtanek
Assignee (at issue)
Eaton 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.