4. Electric lamp and discharge devices
  5. With support and/or spacing structure for electrode and/or...
  6. For filament
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Direct-heated cathode structure and method for the fabrication t

Electric lamp and discharge devices – With support and/or spacing structure for electrode and/or... – For filament
Patent

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Discharged lamp with multiple electron emissive electrode...

Electric lamp and discharge devices – With support and/or spacing structure for electrode and/or... – For filament
Reexamination Certificate

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Dual filament lamp for rapid temperature processing

Electric lamp and discharge devices – With support and/or spacing structure for electrode and/or... – For filament
Reexamination Certificate

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