4. Electric lamp and discharge devices: systems
  5. With radiant energy sensitive control means
  6. Radiant energy controlled regulation of the current supply...
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Device for regulating luminous flux of battery powered headlamp

Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Radiant energy controlled regulation of the current supply...
Patent

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Device permitting of economizing electric lighting energy

Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Radiant energy controlled regulation of the current supply...
Patent

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Dimmer control circuit

Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Radiant energy controlled regulation of the current supply...
Patent

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Driving arrangement for a varying color light emitting element

Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Radiant energy controlled regulation of the current supply...
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