Granted Patent
Utility
US 4,659,248 · App. 06/833,634
Self cleaning pavement marker
Inventor:
Robert M. Flanagan
Patented Case
View Patent ↗
Granted: Apr 21, 1987
Filed: Feb 18, 1986
Inventor
Robert M. Flanagan
Assignee (at issue)
ARTERICA 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.