Portable, visual, and electric traffic signal
United States Patent 2564145
US Patent References:
Traffic-signal device
- - 1546501

Traffic signal
- - 1951431

Warning signal
- - 2158449

Emergency lighting kit
- - 2165562

Signal
- - 2237536


Inventors:
Beall, Donald L.
Menges, Howard C.
Publication Date:
08/14/1951
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Assignee:
Maynard, Nusbaum H.
Orville, Brandon K.
Primary Class:
340/908
Other Classes:
40/590, 116/63P
International Classes:
E01F9/012; E01F9/011