4. Electric lamp and discharge devices
  5. With temperature modifier
  6. Double wall, jacket or casing for envelope

Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH

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Accessory circuit structure for a low-pressure discharge lamp, t

Electric lamp and discharge devices: systems – Combined load device or load device temperature modifying... – Discharge device load
Patent

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Ballast for at least one electric incandescent lamp

Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Discharge control discharge device load
Reexamination Certificate

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Ballast for operating electric lamps

Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Reexamination Certificate

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Ceramic discharge vessel for a high-pressure discharge lamp, hav

Electric lamp and discharge devices – With gas or vapor – Having electrode lead-in or electrode support sealed to...
Patent

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Circuit arrangement and method for starting and operating...

Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Impedance or current regulator in the supply circuit
Reexamination Certificate

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