4. Electricity: circuit makers and breakers
  5. Multiple circuit control
  6. Multiple switch

Richard A. Eardley

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Membrane keyboards

Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent

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Simplified digital pad sensor

Telegraphy – Systems – Position coordinate determination for writing
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Touchpad with dual sensor that simplifies scanning

Telegraphy – Systems – Position coordinate determination for writing
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Profile ID: LFUS-PAI-P-87935

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