4. Electric heating
  5. Heating devices
  6. With power supply and voltage or current regulation or...

John Ohlandt

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Alarm control system

Communications: electrical – Systems – Call station
Patent

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Apparatus for automatically calibrating and testing smoke detect

Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent

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Base loop code transmitter

Communications: electrical – Systems – Signal box type
Patent

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Bobbin construction with strain relief

Inductor devices – Winding with terminals – taps – or coil conductor end...
Patent

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Device for preventing traction power harmonic interference on hi

Railway switches and signals – Block-signal systems – Automatic
Patent

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Profile ID: LFUS-PAI-P-230052

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