Granted Patent
Utility
US 6,026,384 · App. 08/954,534
Cost zones
Inventor:
Richard F. Poppen
Patented Case
View Patent ↗
Granted: Feb 15, 2000
Filed: Oct 21, 1997
Inventor
Richard F. Poppen
Assignee (at issue)
Etak, 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.