Granted Patent
Utility
US 4,351,192 · App. 06/215,000
Fluid flow velocity sensor using a piezoelectric element
Inventors:
Minoru Toda, Susumu Osaka
Patented Case
View Patent ↗
Granted: Sep 28, 1982
Filed: Dec 10, 1980
Inventors
Minoru Toda
Susumu Osaka
Assignee (at issue)
RCA 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.