Granted Patent
Utility
US 6,594,640 · App. 09/602,222
System for electronic barter, trading and redeeming points accumulated in frequent use reward programs
Inventor:
Richard Postrel
Patented Case
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Granted: Jul 15, 2003
Filed: Jun 23, 2000
Inventor
Richard Postrel
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.