Granted Patent
Utility
US 4,479,070 · App. 06/503,004
Vibrating quartz diaphragm pressure sensor
Inventors:
Richard H. Frische, Rudolf C. Dankwort, Charles D. Klem
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Jun 10, 1983
Inventors
Richard H. Frische
Rudolf C. Dankwort
Charles D. Klem
Assignee (at issue)
Sperry Corp.
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.