H04M1/58

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№ п/п	Номер патента	Название патента
2017
1	9542957	Procedure and mechanism for controlling and using voice communication
2016
2	9407356	Digital audio system of an aircraft
3	9369557	Frequency-dependent sidetone calibration
2015
4	9124708	Far-end sound quality indication for telephone devices
2011
5	8027279	Echo cancellation
2007
6	7310420	Telephone headset amplifier with noise blanking capability
2005
7	6917682	Method and device for echo cancelling
8	6850617	Telephone receiver circuit with dynamic sidetone signal generator controlled by voice activity detection
2004
9	6836544	Sidestone reduction in full duplex transceivers
10	6801623	Software configurable sidetone for computer telephony
11	6795550	Echo canceller
12	6768795	Side-tone control within a telecommunication instrument
13	6711259	Method and apparatus for noise suppression and side-tone generation
2003
14	6628779	Method and system for scaleable near-end speech cancellation for tip and ring tone signal detectors
15	6516062	Echo canceling method and apparatus in a communication device
16	6507651	Hybrid amplifier
2002
17	6408069	Compatibility circuit for telephone headset
2001
18	6311071	Low-feedback compact wireless telephone
19	6272220	Electronically switched optically coupled line interface
2000
20	6151391	Phone with adjustable sidetone
21	6091965	Low-feedback compact wireless telephone
22	6084958	Determining the manner in which the wires connecting to a base set of a telephone system are used for transmission and reception of electrical signals representing a communication
23	6055310	Phase reversal tone detector using DSP
24	6052462	Double talk detection and echo control circuit
25	6041118	Architecture for telephone set
1999
26	5999597	Method and apparatus for minimizing system oscillations caused by acoustical coupling
27	5953411	Method and apparatus for maintaining audio sample correlation
28	5946391	Telephones with talker sidetone
29	5933494	Echo canceling method and apparatus in a communication device
30	5918185	Telecommunications terminal for noisy environments
31	5898773	Telephone apparatus with call transfer function and with improved arrangement for hand-free operation
32	5893034	Cordless parent/slave telephone set with improved sidetone handling
1998
33	5852774	Sidetone level reduction circuit and method
34	5819183	Low-feedback compact wireless telephone
35	5774536	Balanced network for use in a keyphone system
36	5771278	Method and apparatus for minimizing system oscillations caused by acoustical coupling
37	5710811	Speech circuit for subscriber telephone apparatus
1997
38	5649008	Circuit and method of reducing sidetone in a receive signal path
39	5640450	Speech circuit controlling sidetone signal by background noise level
40	5608795	Telephone line interface circuit
41	5602912	Telephone hybrid circuit
42	5598467	Signal interface circuit with selectable signal interface parameters
1996
43	5533119	Method and apparatus for sidetone optimization
44	5533105	Method and apparatus for emulating a telephone with a modem and headset
45	5528685	Transformerless hybrid circuit
46	5528683	Method and circuit for implementing an impedance, in particular for DC telephonic applications
47	5524047	Method and apparatus for emulating telephonic communications with a modem and headset
1995
48	5465298	Solid state isolation device using opto-isolators
49	5459787	Circuit for the implementation of an impedance for a telephone speech circuit
50	5398282	Automatic sidetone selector
51	5396549	Terminal station for telecommunication by wire
1994
52	5373554	Telephone having separate power circuit for supplying power to speech network
53	5295186	Termination circuit for a two-wire transmission line
54	5293421	Summing amplifier with a complex weighting factor and interface including such a summing amplifier
55	5282157	Input impedance derived from a transfer network
1993
56	5271059	Method and configuration for forming a line termination of a telephone line
57	5249225	Self-balancing hybrid using digitally programmable attenuator for variable impedance elements
58	5191606	Electrical telephone speech network
1992
59	5133007	Side tone correction circuit
1991
60	5029203	Side tone preventive circuit for telephone
61	4996710	Side-tone adjusting system and method for key telephone system establishing a plurel kinds of speaking paths
1989
62	4856058	Office line interface circuits
63	4796295	Telephone circuits
1988
64	4791638	Signal processsing circuit for a telephone set
65	4782524	Telephone headset interface circuit
66	4756022	Integrated circuit for the transmission of telephone signals
67	4723278	Voice circuit of telephone
68	4718083	Differential receive booster amplifier for telephone instruments
1987
69	4677666	Adaptive line hybrids
1985
70	4558185	Subscriber line interface circuit with complex impedance
71	4550226	Subscriber's telephone circuit arranged to present constant impedance to a telephone line
72	4536616	Microphone or mouthpiece signal suppression circuit
1984
73	4453038	Circuit arrangement for producing control means from line current
74	4445002	Sidetone circuit
1983
75	4418249	Four-wire terminating circuit
76	4412353	Mixing circuit
77	4400588	Electronic voice network for a telephone subscriber's substation
78	4394542	Telephone transmission circuit
1982
79	4332984	Active speech network circuit for a telephone set
80	4314107	Subscriber station networks
1981
81	4282409	Speech networks for telephone sets
1980
82	4238645	Variable loop telephone transmission circuit
83	4236048	Electronic device for subtracting signals and associated system employing such device
84	4230904	Signal control circuit
1979
85	4177361	Signaling tone transparent echo suppressor
86	4146753	Transmit/receive network for telephone-subscriber station
1978
87	4081620	Sidetone control circuit for a telephone set
88	4071713	Telephone speech network
1977
89	4064377	Electronic hybrid and hybrid repeater
90	4031331	Telephone speech network
1976
91	3987253	Hybrid coupling for telecommunication system
92	3974344	Electronic speech circuit for a central battery telephone set
93	3955053	Integrated circuit arrangement for a telephone subscriber station
© 2017, ПАТ-Инфо, В.И. Карнышев Дата формирования списка: 03.04.2017