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GB316536A
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Improvements in and relating to cathodes for electron discharge devices
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GB317504A
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Improvements in and relating to the manufacture of electric discharge devices
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GB271401A
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Improvements in and relating to thermionic valves and methods of manufacturing the same
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GB282539A
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Improvements in and relating to the manufacture of cathodes for thermionic valves
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GB193675A
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Improvements in and relating to electric incandescent lamps of the gas-filled type
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GB191304034A
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Process for the Manufacture of Filaments for Electrical Glow Lamps.
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GB190611944A
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Improvements relating to the Manufacture of Incandescing Bodies for Electric Incandescent Lamps.
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