Granted Patent
Utility
US 4,853,882 · App. 07/115,698
System and method for protecting against redundant mailings
Inventor:
Robert A. Marshall
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Nov 2, 1987
Inventor
Robert A. Marshall
Assignee (at issue)
A.C. Nielsen Company
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.