Granted Patent
Utility
US 4,143,568 · App. 05/811,621
Rotary web cutting apparatus
Inventor:
John Cogswell
Patented Case
View Patent ↗
Granted: Mar 13, 1979
Filed: Jun 30, 1977
Inventor
John Cogswell
Assignee (at issue)
Butler Automatic, Inc.
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.