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GB380094A
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Improvements in electrical discharge tubes
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GB371082A
|
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Gaseous condenser for giving a luminous indication on electrical high tension lines
|
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GB370107A
|
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A device for the progressive segmentary illumination of luminous electric discharge tubes
|
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GB360029A
|
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Leakage transformers with linear adjustment of intensity
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GB348955A
|
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Device for the production of high frequency currents
|
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US1870831A
|
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Luminescent discharge device
|
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GB261002A
|
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Luminous electric discharge tube
|
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GB253926A
|
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Improvements in or relating to electric current switches
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GB253927A
|
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An automatic lighting device for quartz mercury vapour lamps
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GB261003A
|
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Luminous electric discharge tubes
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