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Class Information
Number: 379/387.01
Name: Telephonic communications > Substation or terminal circuitry
Description: Subject matter comprising electrical relationships of circuit elements of a terminal set or a group of such sets connected to a single line circuit.










Sub-classes under this class:

Class Number Class Name Patents
379/395 Amplifying (e.g., agc or avc) 236
379/387.02 Conversion of signal form (e.g., a/d, frequency or phase) 48
379/388.01 For loudspeaking terminal 113
379/393 Hold circuit 127
379/394 Impedance matching or line equalizing 174
379/392.01 Noise suppression 122
379/395.01 Power control or detection circuit 212
379/391 Sidetone control or hybrid circuit (e.g., induction coil) 111
379/396 Visual signalling (e.g., lamp) 162
379/397 Wire distribution 51


Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8712564 Audio conversation apparatus Apr. 29, 2014
8693679 Communications system and associated method for reducing power consumption of a telecommunications device Apr. 8, 2014
8682018 Microphone array with rear venting Mar. 25, 2014
8670771 Systems and methods for implementing location based contact routing Mar. 11, 2014
8660259 Automatic permutation setup and calibration of a headset interface unit Feb. 25, 2014
8559650 Circuit apparatus and method for detecting earphone in portable terminal Oct. 15, 2013
8527259 Contextual translation of digital content Sep. 3, 2013
8515423 System and method for automatic registration notification for over-the-air activation Aug. 20, 2013
8504115 Automatic sidetone control Aug. 6, 2013
8483408 Mobile communication device capable of setting tone color and method of setting tone color Jul. 9, 2013
8471889 Adjusting an image for video conference display Jun. 25, 2013
8457182 Multiple data rate communication system Jun. 4, 2013
8452025 Power supply circuit including voltage regulator and headphone driving circuit employing the same May. 28, 2013
8442189 Unified communications appliance May. 14, 2013
8442811 Contextual translation of digital content May. 14, 2013
8437467 Method and apparatus for non-disruptive telecommunication loop condition determination May. 7, 2013
8369534 Mode switching noise cancellation for microphone-speaker combinations used in two way audio communications Feb. 5, 2013
8358788 Noise cancellation for microphone-speaker combinations using combined speaker amplifier and reference sensing Jan. 22, 2013
8340312 Differential mode noise cancellation with active real-time control for microphone-speaker combinations used in two way audio communications Dec. 25, 2012
8280462 Distributed sound enhancement Oct. 2, 2012
8275105 IP telephone terminal Sep. 25, 2012
8270630 Automatic and dynamic noise cancellation for microphone-speaker combinations Sep. 18, 2012
8249224 Providing speaker identifying information within embedded digital information Aug. 21, 2012
8199905 Systems and methods for identifying subscriber lines Jun. 12, 2012
8150058 Mode switching noise cancellation for microphone-speaker combinations used in two way audio communications Apr. 3, 2012
8126295 Image processing apparatus and method of using the same Feb. 28, 2012
8107618 Method and system for providing DC power on local telephone lines Jan. 31, 2012
8086265 Mobile device interface and methods thereof Dec. 27, 2011
8068884 Acoustic echo reduction circuit for a "hands-free" device usable with a cell phone Nov. 29, 2011
8068605 Programmable keypad Nov. 29, 2011
8064966 Method of detecting a double talk situation for a "hands-free" telephone device Nov. 22, 2011
8036703 Image capture reporting based on content-associated wireless identification Oct. 11, 2011
8014514 Communication terminal device adapted to physical characteristics of telecommunication network and method for adapting communication terminal device to physical characteristic of telecommunica Sep. 6, 2011
8014515 Communication terminal device adapted to physical characteristics of telecommunication network and method for adapting communication terminal device to physical characteristics of telecommunic Sep. 6, 2011
7995743 Method and apparatus for non-disruptive telecommunication loop condition determination Aug. 9, 2011
RE42590 Telephone line coupler Aug. 2, 2011
7978845 Powered patch panel Jul. 12, 2011
7970120 Cell phone based animal sound imitation Jun. 28, 2011
7970121 Tone, modulated tone, and saturated tone detection in a voice activity detection device Jun. 28, 2011
7965833 Febrile convulsion alarm Jun. 21, 2011
7949124 Information processing apparatus, control method for the same, program and storage medium May. 24, 2011
7881457 Apparatus and method of single-in-line embedded modem Feb. 1, 2011
7869768 Techniques for controlling speaker volume of a portable communications device Jan. 11, 2011
7856240 Distributed sound enhancement Dec. 21, 2010
7835516 Direct access arrangement device Nov. 16, 2010
7787614 Sealing current terminator for inhibiting oxidation and methods therefor Aug. 31, 2010
7779150 Enhanced channel access mechanisms for an HPNA network Aug. 17, 2010
7738652 System and method for preventing telephone line blocking by a modem Jun. 15, 2010
7724894 Maintaining line voltage during reset May. 25, 2010
7702095 Method and system for providing DC power on local telephone lines Apr. 20, 2010

1 2 3 4 5 6










 
 
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