4. Electrical resistors
  5. With cooling gas or liquid circulation
  6. Vented or ventilating casing or housing

Alvin S. Drutz

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Electric motor controlling relay

Electrical resistors – With cooling gas or liquid circulation – Vented or ventilating casing or housing
Patent

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Motor controlling relay

Equipment for production – distribution – or transformation of ene – Energy conversion or transformation
Patent

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Piercing valve for tapping pipelines

Fluid handling – With repair – tapping – assembly – or disassembly means – Tapping a pipe – keg – or apertured tank under pressure
Patent

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Profile ID: LFUS-PAI-P-350650

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