LandOfFree - US Patents - Listing for Telephonic communications,Substation or terminal circuitry

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Noise suppression of acoustic signal in telephone set

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

Noise-canceling differential microphone assembly

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

Nonsaturating interface supply

Telephonic communications – Substation or terminal circuitry – Hold circuit

Off-hook disconnect and reconnect ringer device

Telephonic communications – Substation or terminal circuitry – Hold circuit

Office line holding circuit with an automatic release function f

Telephonic communications – Substation or terminal circuitry – Impedance matching or line equalizing

Office line interface circuits

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

Option bus

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

Option bus adapter

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

Outbound noise cancellation for telephonic handset

Telephonic communications – Substation or terminal circuitry

Peak power management and active decoupling arrangement for...

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

Phone with adjustable sidetone

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Pocket speakerphone

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

Portable telecommunications test instrument with a talk battery

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

Portable telephone apparatus

Telephonic communications – Substation or terminal circuitry – Amplifying

Portable telephone set

Telephonic communications – Substation or terminal circuitry – For loudspeaking terminal

Portable terminal

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

Post assembly process for adjusting the gain of an electret micr

Telephonic communications – Substation or terminal circuitry

Pots splitter with line impedance matching

Telephonic communications – Substation or terminal circuitry – Power control or detection circuit

Power efficient ADSL central office downstream class G power...