Granted Patent
Utility
US 6,173,231 · App. 09/494,579
Method and system for collecting data concerning thermal properties of roads for a geographic database and use thereof in a vehicle safety system
Inventor:
Robert Chojnacki
Patented Case
View Patent ↗
Granted: Jan 9, 2001
Filed: Jan 31, 2000
Inventor
Robert Chojnacki
Assignee (at issue)
Navigation Technologies Corp.
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.