4. Electric lamp and discharge devices
  5. Electrode and shield structures
  6. Filament or resistance heated electrodes
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Improving incandescent bulb efficiency

Electric lamp and discharge devices – Electrode and shield structures – Filament or resistance heated electrodes
Patent

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Incandescent bulb and incandescent bulb filament

Electric lamp and discharge devices – Electrode and shield structures – Filament or resistance heated electrodes
Reexamination Certificate

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Incandescent bulb for a motor vehicle

Electric lamp and discharge devices – Electrode and shield structures – Filament or resistance heated electrodes
Reexamination Certificate

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Incandescent lamp filament incorporating hafnium

Electric lamp and discharge devices – Electrode and shield structures – Filament or resistance heated electrodes
Patent

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Incandescent lamp filament with surface crystallites and method

Electric lamp and discharge devices – Electrode and shield structures – Filament or resistance heated electrodes
Patent

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Incandescent light bulb with variable pitch coiled filament

Electric lamp and discharge devices – Electrode and shield structures – Filament or resistance heated electrodes
Reexamination Certificate

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Indirectly heated electrode for gas discharge tube

Electric lamp and discharge devices – Electrode and shield structures – Filament or resistance heated electrodes
Reexamination Certificate

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