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

John A. Karpicke

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Apparatus and method for accessing and maintaining a caller-ID b

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Apparatus and method for detecting telephone line status

Telephonic communications – Multi-line or key substation system with selective switching... – Line status indication or call alerting
Patent

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Personal information center telephone set

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-408436

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