4. Telephonic communications
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Systems for transmitting data via telephone lines

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

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Systems, methods and apparatus for providing a plurality of...

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
Reexamination Certificate

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Systems, methods and apparatus for receipt printing and...

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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Systems, methods and apparatus for tracking on-call activity

Telephonic communications – Audio message storage – retrieval – or synthesis – Message management
Reexamination Certificate

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Systems, methods and apparatus for tracking on-call activity

Telephonic communications – Audio message storage – retrieval – or synthesis – Message management
Reexamination Certificate

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Systems, methods and articles of manufacture for performing dist

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
Patent

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Systems, methods and computer program products for...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of centralized switching system
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Systems, methods and computer program products for...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of centralized switching system
Reexamination Certificate

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Systems, methods and computer program products for...

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of centralized switching system
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Systems, methods and devices for a callback/callback...

Telephonic communications – Special services – Reserved call
Reexamination Certificate

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Systems, methods, and devices for a callback/callback...

Telephonic communications – Special services – Reserved call
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Systems, methods, and devices for a callback/callback...

Telephonic communications – Special services – Reserved call
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Systems, methods, and devices for an enhanced on-hold interface

Telephonic communications – Centralized switching system – Call distribution to operator
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Systems, methods, and devices for an enhanced on-hold interface

Telephonic communications – Centralized switching system – Call distribution to operator
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Sytem for searching unseen messages in a mail inbasket while an

Telephonic communications – Special services – Anonymous party
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