4. Horology: time measuring systems or devices
  5. Chronological
  6. With electro-optical display

James M. Ralson

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Refrigerator ice door delay circuit

Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent

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Systems for regulating voltage to an electrical resistance...

Electric heating – Heating devices – With power supply and voltage or current regulation or...
Reexamination Certificate

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Transformerless LED driving circuit

Horology: time measuring systems or devices – Chronological – With electro-optical display
Patent

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Profile ID: LFUS-PAI-P-1430184

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