Granted Patent
Utility
US 5,797,308 · App. 08/697,934
Hole punch having a slidable slipper and adjustable punches
Inventors:
Alfred J. Evans, Balaji Kandasamy
Patented Case
View Patent ↗
Granted: Aug 25, 1998
Filed: Sep 3, 1996
Inventors
Alfred J. Evans
Balaji Kandasamy
Assignee (at issue)
ACCO BRANDS CORPORATION
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.