Granted Patent
Utility
US 3,931,533 · App. 05/474,359
Ultrasonic signal generator
Inventors:
Frank A. Raso, John J. Saeli
Patented Case
View Patent ↗
Granted: Jan 6, 1976
Filed: May 30, 1974
Inventors
Frank A. Raso
John J. Saeli
Assignee (at issue)
Sybron 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.