4. Communications: electrical
  5. Systems
  6. Call station

John K. Penrod

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Arc suppressor circuit

Electrical transmission or interconnection systems – Switching systems – Repetitive make and break
Patent

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Contactor device including arc supression means

Electricity: electrical systems and devices – Safety and protection of systems and devices – Arc suppression at switching point
Patent

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Cooling arrangement for electrical power contactor

Electricity: electrical systems and devices – Electrostatic capacitors – Fixed capacitor
Patent

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Electrical lighting controller

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

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Electronic underfrequency relay

Communications: electrical – Systems – Call station
Patent

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Profile ID: LFUS-PAI-P-417412

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