Granted Patent
Utility
US 4,328,708 · App. 06/153,292
Rotary ultrasonic testing apparatus
Inventor:
Alan D. Bagwell
Patented Case
View Patent ↗
Granted: May 11, 1982
Filed: May 27, 1980
Inventor
Alan D. Bagwell
Assignee (at issue)
British Steel 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.