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Face plate for coin operated telephone boxes

Telephonic communications – With check operated control
Patent

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Face plate with ad frames for coin operated telephone boxes

Telephonic communications – With check operated control – At terminal station
Patent

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Facilitation of a conference call

Telephonic communications – Special services – Conferencing
Reexamination Certificate

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Facility for detecting and converting dial information and contr

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

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Facility for tying a door intercommunication system with a video

Telephonic communications – Telephone line or system combined with diverse electrical... – Remote control
Patent

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Facility modem-to-modem application

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

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Facility type determination technique

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

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Facsimile and voice communications interface device

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

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

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Facsimile apparatus

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

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Facsimile apparatus

Telephonic communications – Subscriber line or transmission line interface
Reexamination Certificate

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Facsimile apparatus

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

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Facsimile apparatus

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

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Facsimile apparatus

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

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Facsimile apparatus

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

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Facsimile apparatus

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

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Facsimile apparatus

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

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Facsimile apparatus

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

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Facsimile apparatus adapted to communicate via an acoustic coupl

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
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Facsimile apparatus and alarm system with cordless telephone set

Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
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