Granted Patent
Utility
US 4,259,399 · App. 05/938,647
Ultrasonic nonwoven bonding
Inventor:
Berlie R. Hill
Patented Case
View Patent ↗
Granted: Mar 31, 1981
Filed: Aug 31, 1978
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.