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

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

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

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

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Telephone charging signalling detector suitable for central offi

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

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Telephone circuit capable of inhibiting noise of customer premis

Telephonic communications – Substation or terminal circuitry – Sidetone control or hybrid circuit
Patent

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Telephone circuits

Telephonic communications – Substation or terminal circuitry – Sidetone control or hybrid circuit
Patent

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Telephone device

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal
Reexamination Certificate

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Telephone device for amplifying opposite party's voice after use

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

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Telephone for connection to a public telephone network

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

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Telephone handset amplifier circuit

Telephonic communications – Substation or terminal circuitry – Amplifying
Patent

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Telephone handset detector

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal
Patent

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Telephone handset emulator

Telephonic communications – Substation or terminal circuitry
Reexamination Certificate

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Telephone handset interface device

Telephonic communications – Substation or terminal circuitry – Amplifying
Patent

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Telephone handset interface with feedback control

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

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Telephone handset interface with feedback control

Telephonic communications – Substation or terminal circuitry
Reexamination Certificate

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Telephone handset microphone level adjustment

Telephonic communications – Substation or terminal circuitry – Amplifying
Patent

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Telephone handset with user-adjustable amplitude, default...

Telephonic communications – Substation or terminal circuitry – Amplifying
Reexamination Certificate

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Telephone having a speech ban limiting function

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal
Reexamination Certificate

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Telephone having a speech band limiting function

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

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Telephone having automatic gain control means

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal
Patent

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Telephone having four VAD circuits

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal
Reexamination Certificate

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