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GB1248308A
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On-off thermostat control device for a power using means such as a heater
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FR1518536A
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Method and apparatus for periodically connecting and disconnecting a heater
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US3475593A
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Method and arrangement for periodically connecting and disconnecting a heating unit
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FR1491803A
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Electronic switching device
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GB1090956A
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Switching device
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FR1476943A
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Stabilized frequency multivibrator
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GB1061315A
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Phase responsive circuit
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GB1111494A
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Improvements in or relating to temperature responsive apparatus
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FR1446627A
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Adjustment ring usable in particular in switches with clockwork movement
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GB1067181A
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Adjusting ring for time switches
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FR1412761A
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Transistor amplifier
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GB1079917A
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Transistor amplifier
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CA851848A
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Method and arrangement for periodically connecting and disconnecting a heating unit
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