IE17362L
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Electric incandescent lamps
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US2278630A
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Electron valve
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GB510413A
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Process for the production of alkaline earth metal vapours in closed electric discharge tubes with metal bulbs
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GB512292A
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Process for the manufacture of glass
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GB510384A
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Improvements in and relating to the capping of electric incandescent lamps, discharge tubes and the like
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GB512281A
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Improvements in and relating to the manufacture of electric incandescent lamps
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GB507447A
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Method for automatically controlling the frequency of high frequency oscillations
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GB506274A
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Gas-filled electric incandescent lamp
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GB501740A
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Method of and means for controlling the operation of electron multiplying tubes
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GB481227A
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Improvements in and relating to the manufacture of filaments for electric incandescent lamps
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