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US2804604A
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Automatic telephone and like selecting systems
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US2802058A
|
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Automatic exchange systems
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GB795074A
|
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Improvements relating to magnetic informí¡í¡age arrangements
|
|
GB770206A
|
|
Improvements relating to electric cables and cable joints
|
|
GB782293A
|
|
Improvements relating to telephone systems
|
|
GB777762A
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|
Improvements relating to contact spring supports for electromagnetic relays
|
|
GB777509A
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An improved buffer block for contact spring assemblies for electromagnetic relays
|
|
US2792526A
|
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Multi-gap cold-cathode electric discharge tubes and their use for counting and like purposes
|
|
GB779899A
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Improvements relating to electric selective signalling systems
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GB776876A
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Improvements relating to plug and socket connecting boxes
|
|
GB773609A
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Improvements relating to circuit arrangements for the generation of electric pulses
|
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US2797365A
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Circuit arrangement for starting and operating hot-cathode electric discharge lamp
|
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GB777127A
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Improvements relating to electric discharge lamps
|
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GB782019A
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A mechanism for use as a timing device in the metering of telephone calls
|
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GB765705A
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Improvements in or relating to joints in electric cables
|
|
GB783278A
|
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Improvements relating to incandescent electric lamps
|
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US2787666A
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Automatic selecting systems
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GB775188A
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Improvements relating to fluorescent materials
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|
GB765112A
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Improvements relating to telephone systems
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|
GB760743A
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|
Improvements relating to electric contact spring assemblies
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