4. Telephonic communications
  5. With check operated control
  6. Coin signalling or control

Lih-Chuan Su

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Coin call telephone apparatus

Telephonic communications – With check operated control – Coin signalling or control
Patent

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Coin slot structure for coin call telephone apparatus

Telephonic communications – With check operated control – Coin signalling or control
Patent

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Public coin telephone

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Telephone equipment
Patent

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Profile ID: LFUS-PAI-P-46405

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