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MUNICIPAL TRAFFIC-CONTROL SYSTEM.
US 1,251,666 A
Filed
: 09/22/1913
Issued
: 01/01/1918
Est. Priority Date
: 09/22/1913
Status: Expired due to Term
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Time in Patent Office
1,562 Days
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US Class Current
340/909
CPC Class Codes
G08G 1/081
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