Granted Patent
Utility
US 6,311,597 · App. 09/317,468
Self-guiding punch and die set
Inventors:
Michael Schroth, Thomas Rooney
Patented Case
View Patent ↗
Granted: Nov 6, 2001
Filed: May 24, 1999
Inventors
Michael Schroth
Thomas Rooney
Assignee (at issue)
Humdinger, 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.