LandOfFree - US Patents - Listing for Telephonic communications,Substation or terminal circuitry,Conversion of signal form

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telecommunications end station with electrically controlled term

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telecommunications off-hook and intrusion detection method...

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone apparatus

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone applicable to PSTN and IP network and call...

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone applicable to PSTN and IP network and call...

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone charging signalling detector suitable for central offi

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone device for amplifying opposite party's voice after use

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone for connection to a public telephone network

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone handset interface with feedback control

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone having a speech band limiting function

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone having separate power circuit for supplying power to s

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone headset amplifier and method of operation

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone instrument and method for altering audible characteris

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone instrument and method for altering audible characteris

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone interface for simultaneous audio presentation at separ

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone line current modulator

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone line seizure circuit

Telephonic communications – Substation or terminal circuitry – Conversion of signal form

Telephone privacy device