Granted Patent
Utility
US 6,171,415 · App. 09/145,992
Ultrasonic impact methods for treatment of welded structures
Inventor:
Efim Statnikov
Patented Case
View Patent ↗
Granted: Jan 9, 2001
Filed: Sep 3, 1998
Inventor
Efim Statnikov
Assignee (at issue)
UIT, LLC
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.