Granted Patent
Utility
US 6,533,385 · App. 10/016,881
Method for determining a printer's signature and the number of dots per inch printed in a document to provide proof that the printer printed a particular document
Inventors:
Donald G. Mackay, Claude Zeller, Robert A. Cordery, Hugh L. Brunk
Patented Case
View Patent ↗
Granted: Mar 18, 2003
Filed: Dec 14, 2001
Inventors
Donald G. Mackay
Claude Zeller
Robert A. Cordery
Hugh L. Brunk
Assignee (at issue)
Pitney Bowes 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.