4. Illumination
  5. Modifier mountable on light source envelope

OSRAM AG

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Circuit arrangement and method for operating at least one...

Electric lamp and discharge devices: systems – Current and/or voltage regulation – Plural load device regulation
Reexamination Certificate

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Circuit arrangement for providing a DC operating voltage

Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific voltage responsive fault sensor
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Circuit configuration for starting and operating at least...

Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Transformer in the supply circuit
Reexamination Certificate

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Circuit unit

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

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Halogen incandescent lamp incorporating two filaments for...

Electric lamp and discharge devices – Incandescent lamps – Plural filaments or glowers
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