Granted Patent
Utility
US 5,216,229 · App. 07/623,513
Verifiable object having incremental key
Inventors:
Robert A. Copella, Kevin J. Pease
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Dec 7, 1990
Inventors
Robert A. Copella
Kevin J. Pease
Assignee (at issue)
Rand McNally & 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.