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GB568437A
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Improvements in or relating to electronic valves
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GB563054A
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Improvements in dry cells
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US2365399A
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Capping arrangement for electronic valves
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US2350022A
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Electrode assembly of electronic valves
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GB555918A
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Improvements in electronic valves and capping arrangements therefor
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GB556305A
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Improvements in electronic valves especially for the assembling of the mounts
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US2030695A
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Electric lamp
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GB409851A
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Improvements in and relating to protective coverings on electron discharge tubes
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GB415014A
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Improvements in and relating to rectifier units and rectifier valves for such units
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IE12805L
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Thermionic valves
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IE12806L
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Discharge tubes
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GB382230A
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Improvements in and relating to cathodes for thermionic tubes
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GB389886A
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Improvements in and relating to electrodes for discharge tubes
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IE12795L
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Discharge tubes
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IE12689L
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Electrodes
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GB286687A
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An improved electric incandescent lamp with an incandescent body of tantalum carbide
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US1815146A
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Method of producing openings, passages, and the like in molten or pressed glass bodies
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GB281648A
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An improved method of producing openings, passages and the like in glass articles
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GB273252A
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A method of producing openings, passages and the like in glass articles
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