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

David E. Perelli

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Tape cassette

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

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Timed smoke detection

Communications: electrical – Condition responsive indicating system – With particular system function
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Profile ID: LFUS-PAI-P-463077

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