Granted Patent
Utility
US 5,448,915 · App. 08/116,157
Method for improving the accuracy of ultrasonic thickness measurements by calibrating for surface finish
Inventors:
Dan Dunn, Eugene W. Waldenmaier
Patented Case
View Patent ↗
Granted: Sep 12, 1995
Filed: Sep 2, 1993
Inventors
Dan Dunn
Eugene W. Waldenmaier
Assignee (at issue)
Hughes Aircraft Company
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.