4. Telephonic communications
  5. Special services
  6. Conferencing

Marshall B. Garrison

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Audio-video conferencing system

Multiplex communications – Special services – Conferencing
Patent

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Method and apparatus for audio teleconferencing a plurality of p

Telephonic communications – Special services – Conferencing
Patent

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Signal detection and discrimination using waveform peak factor

Telephonic communications – Supervisory or control line signaling – Signal receiver
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Profile ID: LFUS-PAI-P-1614344

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