Granted Patent
Utility
US 5,778,750 · App. 08/598,057
Lever-operated push flap for manual punch
Inventors:
James J. Drzewiecki, Michael J. D'Amore
Patented Case
View Patent ↗
Granted: Jul 14, 1998
Filed: Feb 7, 1996
Inventors
James J. Drzewiecki
Michael J. D'Amore
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.