Granted Patent
Utility
US 4,311,540 · App. 06/145,833
Ultrasonic bonding process
Inventor:
Berlie R. Hill
Patented Case
View Patent ↗
Granted: Jan 19, 1982
Filed: May 1, 1980
Inventor
Berlie R. Hill
Assignee (at issue)
Burlington Industries 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.