Granted Patent
Utility
US 4,800,317 · App. 07/052,908
Ultrasonic transducer method and apparatus
Inventors:
Frank Ingle, John Patrick Claude
Patented Case
View Patent ↗
Granted: Jan 24, 1989
Filed: May 22, 1987
Inventors
Frank Ingle
John Patrick Claude
Assignee (at issue)
MedaSonics, 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.