Granted Patent
Utility
US 4,422,035 · App. 06/329,943
Capacitance measurement probe
Inventor:
Donald Risko
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Dec 11, 1981
Inventor
Donald Risko
Assignee (at issue)
Extrude Hone GmbH
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.