Granted Patent
Utility
US 4,574,720 · App. 06/648,785
Method and apparatus for filling valved bags
Inventor:
J. George Lepisto
Patented Case
View Patent ↗
Granted: Mar 11, 1986
Filed: Sep 6, 1984
Inventor
J. George Lepisto
Assignee (at issue)
Champion International Corporation Limited
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.