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US3047003A
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Flow proportioning system for foam producing apparatus
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Pulse transmission circuit
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System of automatic offset control for traffic signals
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Traffic signal adapter
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Telephone-equipped alarm box
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Multivibrator
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Electric differential counter
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Plug-in electro-mechanical devices
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System of automatic offset control for traffic signals
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Temperature compensated pneumatic time delay devices
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Wire insulation coloring apparatus
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Repeat cycle timers
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Single pen, multichannel recording or indicating meter
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Traffic adjusted traffic control systems
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Traffic cycle length selector
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Vibration-resistant escapements
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Slider contact
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Amplifier circuits
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Infrared detectors
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Traffic controllers employing static, logic control elements
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