Granted Patent
Utility
US 5,376,890 · App. 08/074,915
Capacitive distance measuring apparatus having liquid ground contact
Inventors:
Michael D. Keevil, Brian E. Burgdorf, Paul D. Ketterer, Edwin T. Wood, Jr.
Patented Case
View Patent ↗
Granted: Dec 27, 1994
Filed: Jun 10, 1993
Inventors
Michael D. Keevil
Brian E. Burgdorf
Paul D. Ketterer
Edwin T. Wood, Jr.
Assignee (at issue)
MEMC Electronic Materials, 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.