Granted Patent
Utility
US 4,474,503 · App. 06/360,584
Traffic control apparatus
Inventors:
William L. Booth, Leslie S. Stone
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Mar 22, 1982
Inventors
William L. Booth
Leslie S. Stone
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.