Granted Patent
Utility
US 6,539,175 · App. 09/606,944
Highway crash barrier monitoring system
Inventors:
Jeffrey A. Geary, David A. Smith
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: Jun 29, 2000
Inventors
Jeffrey A. Geary
David A. Smith
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.