4. Communications: electrical
  5. Continuously variable indicating
  6. With meter reading

John B. Riddle

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Multiple document recognition apparatus

Check-actuated control mechanisms – Including noncontacting – relatively movable parts connected...
Patent

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Vending machine acquisition system

Communications: electrical – Continuously variable indicating – With meter reading
Patent

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Vending machine acquisition system

Communications: electrical – Continuously variable indicating – With meter reading
Patent

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Profile ID: LFUS-PAI-P-1403837

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