Granted Patent
Utility
US 6,695,469 · App. 09/989,790
Roadway freezing point monitoring system and method
Inventor:
Patrick A. Leonhardt
Patented Case
View Patent ↗
Granted: Feb 24, 2004
Filed: Nov 19, 2001
Inventor
Patrick A. Leonhardt
Assignee (at issue)
ENERGY ABSORPTION SYSTEMS, 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.