Granted Patent
Utility
US 4,604,542 · App. 06/634,073
Broadband radial vibrator transducer with multiple resonant frequencies
Inventor:
Stephen C. Thompson
Patented Case
View Patent ↗
Granted: Aug 5, 1986
Filed: Jul 25, 1984
Inventor
Stephen C. Thompson
Assignee (at issue)
Gould 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.