4. Electricity: circuit makers and breakers
  5. Liquid contact
  6. Time delay

John W. Cannon

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Load break switch arc suppression

Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent

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Magnetic card reader

Registers – Coded record sensors – Particular sensor structure
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Programmable card actuated lock

Registers – Calculators – Input-output calculator to indicator – printer – etc.
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Profile ID: LFUS-PAI-P-615273

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