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DE1151878B
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Circuit arrangement for operating a sodium vapor discharge lamp with different input powers
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GB888810A
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Improvements relating to street lighting lanterns and the like
|
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US3035207A
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Circuit arrangement for operating electric discharge lamp
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GB880579A
|
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Improvements relating to electrical connections
|
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GB946073A
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Improvements relating to luminescent materials
|
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GB946296A
|
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Improvements relating to luminescent materials
|
|
GB955656A
|
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Operation of electric discharge lamps
|
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GB955655A
|
|
Improvements relating to electric discharge lamps
|
|
GB888809A
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Improvements relating to lanterns
|
|
GB888808A
|
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Improvements relating to lanterns
|
|
GB894332A
|
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Improvements relating to lanterns
|
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GB869003A
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Improvements in electric incandescent lamps
|
|
GB920496A
|
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Improvements in vehicle headlamps with double filaments
|
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GB894934A
|
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Improvements relating to lanterns
|
|
GB864234A
|
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Improvements in and relating to electric discharge lamps
|
|
GB927952A
|
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Circuit arrangements for operating electric discharge lamps
|
|
GB906028A
|
|
Improvements relating to the gettering of evacuated envelopes
|
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GB860619A
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Improvements relating to lighting fittings
|
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GB861361A
|
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Improvements relating to the capping of electric lamps
|
|
GB887657A
|
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Improvements relating to lanterns for tubular electric lamps
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