4. Telephonic communications
  5. Supervisory or control line signaling
  6. Signal receiver

Andrew S. Crowe

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Call progress monitoring

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line
Patent

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Independent hysteresis apparatus for tone detection

Telephonic communications – Supervisory or control line signaling – Signal receiver
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Method and apparatus for editing source files of differing data

Boots – shoes – and leggings
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Method for time-scale modification of signals

Electrical audio signal processing systems and devices – One-way audio signal program distribution – Public address system
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Profile ID: LFUS-PAI-P-1171357

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