Granted Patent
Utility
US 4,247,349 · App. 06/038,568
Method and apparatus for cutting plastic film windows for cartons
Inventors:
Robert M. Detert, Hubert J. Germiat, William Kelly
Patented Case
View Patent ↗
Granted: Jan 27, 1981
Filed: May 14, 1979
Inventors
Robert M. Detert
Hubert J. Germiat
William Kelly
Assignee (at issue)
American Can Company
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.