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DE529983C
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Electric metal wire incandescent lamp
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DE532426C
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A luminaire made of a flat metal wire coil for electric light bulbs
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DE561637C
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Filament support frame for electric incandescent tubes
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DE542173C
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Machine for melting glass feet in straight glass tubes of electric incandescent lamps and electric light tubes
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GB339513A
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Electric tubular lamp and method of making same
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DE596833C
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Electric tube incandescent lamp with rigid support for the filament support
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DE561841C
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Illumination bar
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DE548678C
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Glass body for electric light bulbs with laterally arranged contacts
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DE545928C
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Process for the production of electric tubular incandescent lamps
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