Granted Patent
Utility
US 5,893,081 · App. 08/756,263
Using multiple levels of costs for a pathfinding computation
Inventor:
Richard F. Poppen
Patented Case
View Patent ↗
Granted: Apr 6, 1999
Filed: Nov 25, 1996
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.