Granted Patent
Utility
US 4,523,472 · App. 06/521,444
Ultrasonic transceiver circuit
Inventor:
Frederick K. Blades
Patented Case
View Patent ↗
Granted: Jun 18, 1985
Filed: Aug 8, 1983
Inventor
Frederick K. Blades
Assignee (at issue)
PureCycle 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.