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GB191227442A
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Improvements relating to the Manufacture of Bodies of Tungsten, with Small Additions of other Metals, for use in Electric Incandescent Lamps.
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GB191006397A
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An Improved Support for Incandescence Filaments in Electric Glow-lamps.
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US1038613A
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Metal-filament incandescent lamp.
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GB190810891A
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Improvements in and relating to the Manufacture of Filaments for Electric Incandescent Lamps.
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GB190810885A
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Improvements in and relating to the Manufacture of Filaments for Electric Incandescent Lamps.
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GB190808421A
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Improvements relating to Incandescent Filaments for Electric Incandescent Lamps.
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