4. Telephonic communications
  5. Substation or terminal circuitry
  6. Visual signalling

Ronald S. Lesniak

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Crescendo telephone ringer

Telephonic communications – Supervisory or control line signaling – Signal reception at substation
Reexamination Certificate

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High voltage message waiting circuit

Telephonic communications – Substation or terminal circuitry – Visual signalling
Patent

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Housing for network access device

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

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Method and apparatus for detecting data port usage

Telephonic communications – Subscriber line or transmission line interface
Reexamination Certificate

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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-1644608

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