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Call transmitter for the input of control commands,...

Telephonic communications – Supervisory or control line signaling – Substation originated
Reexamination Certificate

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Call-routing device

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

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Canonical telephone numbers

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

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Card system

Telephonic communications – Supervisory or control line signaling – Substation originated
Reexamination Certificate

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Card-like device having a microprocessor and speaker for communi

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

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CAS tone disguising method and apparatus

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

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Cellular car telephone dialing controller

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

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Circuit and method for automatic memory dialing

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

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Circuit arrangement for generating an acoustic ringing signal in

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

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Circuit for surge voltage protection in electronic telephone sta

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

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Circuit for transmitting voice signals and dial pulses

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

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Combined writing and signaling instrument

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

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Communication apparatus

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

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Communication apparatus

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

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Communication apparatus

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

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Communication apparatus for automatic dialing from a separate te

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

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Communication apparatus with facilities for changing to a pulse

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

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Communication apparatus with stored sets of destination and...

Telephonic communications – Supervisory or control line signaling – Substation originated
Reexamination Certificate

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Communication device

Telephonic communications – Supervisory or control line signaling – Substation originated
Reexamination Certificate

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Communication device

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

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