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TRAFFIC CONTROL SYSTEM AND SIGNAL EQUIPMENT FOR USE THEREIN
US 3,529,284 A
Filed
: 06/22/1967
Issued
: 09/15/1970
Est. Priority Date
: 06/24/1966
Status: Expired due to Term
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Current Assignee
Villemain Charles Auguste
Original Assignee
Villemain Charles Auguste
Inventors
VILLEMAIN CHARLES AUGUSTE
Application Number
US04/647,993
Time in Patent Office
1,181 Days
Field of Search
US Class Current
340/932
CPC Class Codes
G08G 1/04
using optical or ultrasonic...
G08G 1/075
Ramp control
G08G 1/08
according to detected numbe...
G08G 1/082
Controlling the time betwee...
G08G 1/096783
where the origin of the inf...
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