LandOfFree - US Patents - Listing for Telephonic communications

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

DTMF transmission and displaying method for facsimile system

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

Dual channel ISDN terminal call identification and switching sys

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...

Dual connection mode equipped communication control apparatus

Telephonic communications – Echo cancellation or suppression

Dual echo canceller and method for increasing dynamic range...

Telephonic communications – Echo cancellation or suppression – Using digital signal processing

Dual echo canceller with fast reflector identification

Telephonic communications – Reception of calling information at substation in wireline... – Blocking caller id transmission

Dual format caller ID for both FSK and DTMF caller ID formats

Telephonic communications – Supervisory or control line signaling – Signal receiver

Dual hysteresis signal detection circuit

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

Dual impedance hybrid

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...

Dual IP phone and method of telecommunicating by using the same

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

Dual keypad telephone handset for mobile communications

Telephonic communications – Reception of calling information at substation in wireline... – Extracting call id from transmitted signal

Dual language caller ID with asian language support

Telephonic communications – Multi-line or key substation system with selective switching... – Switching or supervision feature

Dual line adapter for telephone answering machine

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

Dual mode cellular modem

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

Dual mode cellular radio communication apparatus having an echo

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

Dual mode cellular radio communication apparatus having an echo

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

Dual mode cellular telephone apparatus

Telephonic communications – Subscriber line or transmission line interface – Network interface device

Dual mode LMS nonlinear data echo canceller

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal

Dual mode monitor module

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...

Dual mode phone line interface