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CH20050A
(en)
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Osmium vacuum lamp
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CA73532A
(en)
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Osmium vacuum incandescent lamp
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CA73871A
(en)
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Osmium vacuum lamp
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DK3792C
(en)
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Incandescent reflector.
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DK4137C
(en)
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Device for self-igniters for gas incandescent lamps.
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DK3485C
(en)
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Procedure for Regenerating Osmium Bulbs.
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DK5663C
(en)
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Base for Incandescent lamps.
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DK3431C
(en)
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Regenerative- Gas incandescent lamp.
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DK4029C
(en)
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Device for Fastening Incandescent lamps.
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DK3850C
(en)
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Petroleum light bulb.
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DK3423C
(en)
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Burner for Gas Bulbs.
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DK4376C
(en)
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Burner for spirit incandescent lamps without wicks.
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DK4843C
(en)
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Holder for Incandescent lamps.
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DK5113C
(en)
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Gas incandescent lamp.
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DK4935C
(en)
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Gas incandescent lamp.
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DK2096C
(en)
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Incandescent lamps for gas incandescent lamps.
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DK5205C
(en)
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Self-amplifying Lamp for Gas Incandescent Light.
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DK3638C
(en)
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Spring base for electric incandescent lamps.
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DK2322C
(en)
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Fluid for Incandescent Light Bulbs.
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ES28384A1
(en)
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A new mounting system for incandescent lamps.
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DK2162C
(en)
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Burner for Incandescent lamps.
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DK4284C
(en)
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Glass sawing procedure.
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DK3857C
(en)
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Annular filament for multiphase Nern lamps.
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DK5446C
(en)
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Gas incandescent lamp.
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DK4015C
(en)
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Lighting system with Nernst lamps.
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