Granted Patent
Utility
US 4,848,202 · App. 07/114,616
Cut off or cross perforator or scoring cylinder with quick blade release
Inventor:
C. Philip Crampton
Patented Case
View Patent ↗
Granted: Jul 18, 1989
Filed: Oct 29, 1987
Inventor
C. Philip Crampton
Assignee (at issue)
The Hamilton Tool 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.