Title:
Traffic signal
United States Patent 1776447


Inventors:
Parkhurst, Karl C.
Application Number:
US40346929A
Publication Date:
09/23/1930
Filing Date:
10/30/1929
Assignee:
Parkhurst, Karl C.
Primary Class:
Other Classes:
40/610, 40/612
International Classes:
E01F9/04; E01F9/627
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