4. Communications: electrical
  5. Audible indication
  6. Percussion-type sound producer

Roger D. Swadling

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Coded card reader systems

Registers – Coded record sensors – Particular sensor structure
Patent

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Detection circuits for position sensors

Electricity: measuring and testing – Magnetic – Displacement
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Optical displacement transducers

Communications: electrical – Audible indication – Percussion-type sound producer
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Profile ID: LFUS-PAI-P-317695

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