Traffic control light
United States Patent 2434741

Inventors:
Hefner, George D.
Pramschiefer, Albert C.
Publication Date:
01/20/1948
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Assignee:
Hefner, George D.
Pramschiefer, Albert C.
Primary Class:
340/321
Other Classes:
362/577
International Classes:
G09F21/02; G09F21/00
US Patent References:
2362131Luminous baton