Granted Patent
Utility
US 5,601,006 · App. 08/314,876
Punch tool with interchangeable die
Inventors:
Charles Quinn, Robert T. Schofield
Patented Case
View Patent ↗
Granted: Feb 11, 1997
Filed: Sep 29, 1994
Inventors
Charles Quinn
Robert T. Schofield
Assignee (at issue)
Fiskars 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.