4. Telephonic communications
  5. With check operated control
  6. Other than coin

Shigehiro Eda

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Pay phone call control apparatus for allowing calls using pre-pa

Telephonic communications – With check operated control – Other than coin
Patent

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Public telephone set

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Patent

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Profile ID: LFUS-PAI-P-143653

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