Granted Patent
Utility
US 4,929,256 · App. 07/246,225
Multi-disc cutter and method of manufacture
Inventor:
Mark Shepherd
Patented Case
View Patent ↗
Granted: May 29, 1990
Filed: Sep 19, 1988
Inventor
Mark Shepherd
Assignee (at issue)
AM International, 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.