Granted Patent
Utility
US 4,484,521 · App. 06/470,831
Date band indexing mechanism for endorser
Inventors:
Richard Frystak, Donald R. Friedlund
Patented Case
View Patent ↗
Granted: Nov 27, 1984
Filed: Feb 28, 1983
Inventors
Richard Frystak
Donald R. Friedlund
Assignee (at issue)
Bell and Howell, LLC
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.