Granted Patent
Utility
US 4,729,690 · App. 06/928,899
Self-righting highway marker support and method for installing same
Inventors:
Michael R. Lavender, Henry R. Krepel, Sidney A. Heenan
Patented Case
View Patent ↗
Granted: Mar 8, 1988
Filed: Nov 10, 1986
Inventors
Michael R. Lavender
Henry R. Krepel
Sidney A. Heenan
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.