4. Multiplex communications
  5. Wide area network
  6. Packet switching

Joseph Q. Chapman

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Call establishment for simultaneous analog and digital communica

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent

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Controlled simultaneous analog and digital communication

Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Patent

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Digital subscriber line diagnostic system

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of data transmission
Reexamination Certificate

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Digital subscriber line diagnostic system

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of data transmission
Reexamination Certificate

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Digital subscriber line service over loaded loops

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1420042

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