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GB538197A
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Process for the manufacture of frames for electric incandescent lamps with hard glass or quartz glass bulbs
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GB534914A
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Improvements in and relating to the manufacture of iron-hydrogen resistances
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GB534629A
|
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Process for the manufacture of gas-filled coiled coil electric incandescent lamps
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|
GB603424A
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Gas-filled electric incandescent lamp with double helical incandescent body
|
|
GB519921A
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Visual tuning indicator
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DE730067C
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Tubular gas discharge lamp with an incandescent electrode that can be heated by means of a current passage and a fluorescent wall coating
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GB520664A
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Screen for electric illuminating devices
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GB526233A
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Electron tube
|
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DE738416C
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|
Process for the production of ferrous hydrogen resistors
|
|
GB520882A
|
|
Improvements in and relating to amplifier circuits
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|
DE705198C
|
|
Voting indicator tubes
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|
GB496864A
|
|
Process for gilding grids for electric discharge tubes
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|
GB502588A
|
|
Gas-filled electric incandescent lamp
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GB502769A
|
|
Process for the production of high filling gas pressures in electric incandescent lamps and discharge lamps
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GB490131A
|
|
Process for the manufacture of oxide cathodes
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|
GB491769A
|
|
Electric incandescent lamp
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|
GB514882A
|
|
Process for hard soldering metal bodies, especially the anodes of electric discharge tubes
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DE717963C
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|
Electric light bulb for air raid purposes
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GB497880A
|
|
Electric incandescent lamp
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GB488471A
|
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High pressure positive column electric arc lamp
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