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

Gaylan I. Larson

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Telephone privacy device with conference and indicator features

Telephonic communications – Multi-line or key substation system with selective switching... – With exclusion or priority feature
Patent

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Voice mail indicator for a telephone system

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

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Profile ID: LFUS-PAI-P-641828

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