Granted Patent
Utility
US 4,710,053 · App. 06/615,878
Traffic control elements
Inventors:
Jack H. Kulp, Richard M. Cunningham
Patented Case
View Patent ↗
Granted: Dec 1, 1987
Filed: May 30, 1984
Inventors
Jack H. Kulp
Richard M. Cunningham
Assignee (at issue)
Lukens General Industries, 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.