LandOfFree - US Patents - Listing for Telephonic communications

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

Frequency responsive apparatus for reading a meter over a teleph

Telephonic communications – Polystation line system – Call alerting

Frequency responsive party telephone line selection apparatus an

Telephonic communications – Polystation line system – Call alerting

Frequency responsive selective ringing circuit

Telephonic communications – Polystation line system – Call alerting

Frequency ring director

Telephonic communications – Supervisory or control line signaling – Signal receiver

Frequency selective ringer circuit

Telephonic communications – Subscriber line or transmission line interface – Hybrid circuit

Frequency sensitive inductance device in POTS splitter design

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

Frequency-based discount system for host-system within a...

Telephonic communications – Line equalization or impedance matching

Frequency-dependent impedance synthesis for DSL interface...

Telephonic communications – Terminal – Housing or housing component

Front-cover for communication equipment and method for...

Telephonic communications – Reception of calling information at substation in wireline...

FSK decoder for caller ID

Telephonic communications – With check operated control – Coin signalling or control

Full coin box signalling device for use with coin telephones

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Full duplex communication circuits with bilateral T hybrid...

Telephonic communications – Echo cancellation or suppression

Full duplex echo cancelling circuit

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Full duplex speaker-phone providing increased loop stability

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Full duplex speakerphone

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Full duplex speakerphone

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

Full duplex speakerphone for radio and landline telephones

Telephonic communications – Terminal – Having loudspeaking conversation capability

Full duplex speakerphone system

Telephonic communications – Echo cancellation or suppression

Full duplex telephone set using echo cancellation and side...