Granted Patent
Utility
US 4,756,520 · App. 06/844,004
Mechanism for weighting and applying postage to mail
Inventors:
Jack G. Clark, Jr., Steven Derby
Patented Case
View Patent ↗
Granted: Jul 12, 1988
Filed: Mar 25, 1986
Inventors
Jack G. Clark, Jr.
Steven Derby
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.