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US984016A
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Vacuum-tube.
|
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US961151A
|
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Mechanical joint for vacuum-tubes.
|
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US995025A
|
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Mechanical joint for vacuum-tubes.
|
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US955895A
|
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Fixture and reflector for vacuum-tubes.
|
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US1014247A
|
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Hand-fire for making joints in vacuum-tube lamps.
|
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US1020110A
|
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Terminal for gas and vapor electric apparatus.
|
|
US975149A
|
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Automatic gas-feed for vacuum-tubes.
|
|
US930404A
|
|
Automatic gas-feed for vacuum-tubes.
|
|
US968677A
|
|
Automatic gas-feed for vacuum-tubes.
|
|
US1005867A
|
|
Vacuum-tube lighting.
|
|
US856483A
|
|
Automatic gas-feed for vacuum-tube lamps.
|
|
US1010670A
|
|
Automatic gas-feed for vacuum-tubes.
|
|
US856484A
|
|
Automatic gas-feed for vacuum-tubes.
|
|
GB190609916A
|
|
Vacuum Tube Electric Apparatus.
|
|
US855801A
|
|
Gas-valve.
|
|
US1005866A
|
|
Means for preventing an electric discharge through a gas column.
|
|
US994329A
|
|
Photometer.
|
|
US869925A
|
|
Pressure-gage.
|
|
US895485A
|
|
Vacuum-tube lighting.
|
|
US895487A
|
|
Vacuum-tube apparatus.
|
