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Object oriented system and method for directing incoming...

Telephonic communications – Centralized switching system – Call distribution to operator
Reexamination Certificate

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Object oriented system for modeling telecommunications circuits

Telephonic communications – With usage measurement – Call charge metering or monitoring
Patent

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Object-oriented programmable dedicated dialer device and method

Telephonic communications – Supervisory or control line signaling – Substation originated
Patent

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Object-oriented telephony system

Telephonic communications – Special services – Anonymous party
Patent

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Obtaining information about a called telecommunications party

Telephonic communications – With usage measurement – Call charge metering or monitoring
Reexamination Certificate

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Odd-order low-pass pots device microfilter

Telephonic communications – Subscriber line or transmission line interface
Reexamination Certificate

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Odd-order low-pass POTS device microfilter

Telephonic communications – Subscriber line or transmission line interface
Reexamination Certificate

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Off-hook detection and soft line seizure for telephone line shar

Telephonic communications – Audio message storage – retrieval – or synthesis
Patent

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Off-hook detector for headset

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

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Off-hook disconnect and reconnect ringer device

Telephonic communications – Substation or terminal circuitry – Hold circuit
Patent

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Off-hook notifier

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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Off-hook signal and dial pulse generating circuit and a method f

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

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Off-hook telephone clearing system

Telephonic communications – Supervisory or control line signaling – Using line or loop condition detection
Patent

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Off-hook telephone with temporary park feature

Telephonic communications – Terminal – Switch or switch actuator structure
Patent

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Off-hook visual message waiting indicator

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

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Off-load cellular system for off-loading cellular service from a

Telephonic communications – Audio message storage – retrieval – or synthesis
Patent

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Off-load-cellular system for off-loading cellular service from a

Telephonic communications – Audio message storage – retrieval – or synthesis
Patent

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Offender message delivery system

Telephonic communications – Telephone line or system combined with diverse electrical... – To produce visual-graphic copy
Reexamination Certificate

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Office call state display system

Telephonic communications – Centralized switching system – Call distribution to operator
Reexamination Certificate

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Office line holding circuit with an automatic release function f

Telephonic communications – Substation or terminal circuitry – Hold circuit
Patent

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