|
GB618952A
|
|
Apparatus for detecting the occurrence of a sequence of events
|
|
GB615978A
|
|
Means for detecting presence and movement of bodies
|
|
GB616534A
|
|
Traffic detection apparatus
|
|
GB603169A
|
|
Vehicle detector
|
|
GB613021A
|
|
Traffic detectors
|
|
US2417443A
|
|
Signal
|
|
US2297683A
|
|
Traffic actuated control apparatus
|
|
GB565670A
|
|
Improvements in or relating to electrical apparatus for counting passing objects
|
|
US2291855A
|
|
Traffic actuated signaling apparatus
|
|
US2339149A
|
|
Cyclic circuit controller
|
|
US2311360A
|
|
Control system
|
|
US2282142A
|
|
Traffic actuated signaling apparatus
|
|
US2288601A
|
|
Traffic cycle selector apparatus
|
|
US2249100A
|
|
Traffic actuated control system
|
|
US2271727A
|
|
Cyclic circuit controller
|
|
US2311359A
|
|
Control system
|
|
GB542356A
|
|
Improvements relating to electronic amplifiers
|
|
US2279896A
|
|
Traffic actuated signaling apparatus
|
|
US2265991A
|
|
Traffic control apparatus
|
|
US2292714A
|
|
Cyclic circuit controller
|
