Title:
Combined pedestrian traffic signal and advertising device
Document Type and Number:
United States Patent 2503574
Inventors:
Allen, John S.
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Sponsored by: Flash of Genius |
Publication Date:
04/11/1950
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Referenced by:
Export Citation:
Assignee:
WALKOLITE COMPANY INC
Primary Class:
Other Classes:
362/152, D10/114, 340/925, 40/446, 40/545
International Classes:
E01F9/053; G09F13/26; E01F9/04; G09F13/00
US Patent References:
Foreign References:
| GB191411906A |