Granted Patent
Utility
US 4,951,891 · App. 07/298,934
Web slitter and groover system
Inventors:
Nestor Kozbur, Richard Shankel
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Jan 23, 1989
Inventors
Nestor Kozbur
Richard Shankel
Assignee (at issue)
James River Corporation
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.