Granted Patent
Utility
US 5,948,985 · App. 08/866,817
Method and apparatus for ultrasonic testing of aluminum billet
Inventors:
David R. Brautigan, Charles D. Merckle
Patented Case
View Patent ↗
Granted: Sep 7, 1999
Filed: May 30, 1997
Inventors
David R. Brautigan
Charles D. Merckle
Assignee (at issue)
Ormet 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.