4. Recording, communication, or information retrieval equipment
  5. Video or audio transmission, recording or playback equipment
  6. Telephone equipment

Ian D. Buchanan

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Base for a telephone set or similar article

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

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Shutter mechanism for telephone directory

Telephonic communications – Supervisory or control line signaling – Substation originated
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Profile ID: LFUS-PAI-P-1033040

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