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US2405229A
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Electrical oscillatory system and apparatus
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US2283216A
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Cathode for discharge tubes
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US2283189A
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Electric discharge lamp
|
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US2289588A
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Electron discharge tube
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US2270814A
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Lighting fixture
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US2284495A
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Electron tube mount of the shielded element type
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US2268522A
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Relay for electric gaseous discharge lamps
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US2267435A
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Apparatus for cleaning electric lamp bulbs
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US2268510A
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Lamp sealing apparatus
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US2288606A
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Fluorescent lamp fixture
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US2292235A
|
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Tension adjusting device
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US2258158A
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Electric discharge lamp cathode
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US2267594A
|
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Pressure adjuster for gaseous discharge lamps
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US2290837A
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Glass severing apparatus
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US2268512A
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Series lamp circuit
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GB549485A
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Improvements in and relating to electrodes and other metal parts of electron discharge devices
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US2287024A
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Apparatus for coating fluorescent lamp tubing
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US2264304A
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Lamp basing machine
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US2284151A
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Unitary stem and contact base for electron tubes and the like
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US2292220A
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Lamp tubing conveyer
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