Granted Patent
Utility
US 4,531,073 · App. 06/499,772
Piezoelectric crystal resonator with reduced impedance and sensitivity to change in humidity
Inventor:
Errol P. EerNisse
Patented Case
View Patent ↗
Granted: Jul 23, 1985
Filed: May 31, 1983
Inventor
Errol P. EerNisse
Assignee (at issue)
Ohaus Scale 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.