H04M1/74

СПИСОК патентов США - подгруппа МПК¹⁶ H04M1/74

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№ п/п	Номер патента	Название патента
2017
1	9570904	Transmission bandwidth extender/category 6 surge protector
2016
2	9363364	Method for correcting telephone signal degradation caused by the length of the analog line via the receiver
2015
3	9167077	Surge protection circuit and communication apparatus
2014
4	8848504	DSL alien noise reduction
5	8666059	Method and device for processing data and to a communication system comprising such device
2006
6	7046798	System and method for subliminal time domain duplexing
2005
7	6914963	Determining the composition of subscriber loops from frequency domain measurements
8	6876742	High-voltage protection circuitry in a data access arrangement
9	6842520	Telephone
2004
10	6788953	Wireless local loop communication system using SLIC module
11	6782098	Protection circuit/method for subscriber telephone interface circuit
12	6757386	Apparatus, system, and method for efficient reduction of electromagnetic interference in telecommunications equipment
13	6748077	Station interface and protector with built in redundancy
14	6744883	Filter system and method to suppress interference imposed upon a frequency-division multiplexed channel
15	6731752	Method and circuit for echo-cancellation in two-way communications
16	6714647	Network interface unit with subscriber line daughter boards
2003
17	6665400	Low-voltage transistor circuit for suppressing high-voltage surges in a telephone line interface circuit
18	6661893	Telephone loop monitoring and isolation system
19	6643270	Method of compensating for systemic impairments in a telecommunications network
20	6628782	Ring voltage termination by means of a spare fuse
21	6608899	Telephone circuit surge protection module
22	6606231	Integrated telephony subscriber line protection and filter device
23	6507654	Line interface battery feed arrangements with PTC resistors
2002
24	6480604	Balanced spectrum limiter for telephone and communication systems and protection module incorporating the same
25	6473507	Apparatus and method for isolating transients associated with a digital subscriber line
26	6434220	Long-distance transmission system and device
27	6418222	High current protection circuit for telephone interface
28	6418220	Extended feedback circuit employing capacitive coupling and sampled data filters
29	6411680	Telephonic apparatus and input device for telephonic apparatus
30	6384946	Electrical isolation between IR receiver and further electronic circuits
31	6342999	Current surge absorbing wire winding box
2001
32	6327301	Detection and adaptation to digital network impairments by PCM modems
33	6298134	System for protecting telecommunications equipment from transient voltages
34	6275581	Extended feedback circuit employing capacitive coupling and sampled data filters
35	6259589	Protection apparatus applied to a telephone line
36	6229890	Network interface device with automatic connector closure
37	6205201	Telephone line testing device
38	6186834	Enhanced communication connector assembly with crosstalk compensation
39	6185296	Ring trip circuit for stopping call signal at different timing from zero-crossing point of call signal
40	6185083	Protected telecommunication test adapter module
41	6178162	Method and apparatus for inhibiting echo in a channel of a communication system
42	6176742	Capacitive crosstalk compensation arrangement for communication connectors
2000
43	6163447	Telephone equipment protection circuit
44	6151392	Telecommunications protector panel connector assembly
45	6134321	Modem loop current detect system to detect an off-hook condition in an extension telephone
46	6128368	Apparatus for monitoring telecommunication transmission
47	6111936	Method and apparatus for automatically detecting and measuring distortion in a DSL system
48	6091338	System and method for safety protection of XDSL circuitry
49	6088446	Protection circuit for use with a telephone appliance and methods of use
50	6078662	Radio frequency interference filter
51	6060972	Method and means for replacing an electrically conducting cable by another electrically conducting cable
52	6055435	Wireless telephone connection surge suppressor
1999
53	5975924	Grounding mechanism with integrated strain relief
54	5959815	Method and apparatus for detecting potentially damaging electrical fields
55	5953194	Arrangement for protecting telecommunications equipment from voltage transients
56	5888085	Network interface device with switchable contacts
57	5883953	Telephone and data communications line protection module and grounding spring clip
58	5878132	High-frequency noise elimination for use in telephone systems
59	5867083	Protective device for surge current protection of associated equipment in communications systems
60	5857010	Power-failure resistant communication system
1998
61	5818923	System and method for supressing pulse dialing feedback occurring particularly with auxiliary acoustic ringers in socket telephone systems
62	5815918	Method for replacing an electrically conducting cable by another electrically conducting cable
63	5809109	Integrated ring sensor with fault detection
64	5802170	Customer bridge module
65	5783999	Audio warning device for use with a line current protection circuit in a PCMCIA-architecture modem card
66	5777836	Line current protection circuit and method for use with a PCMCIA-architecture modem card
67	5719917	Circuit for activating back-up lines
68	5717558	Electrostatic discharge protection for an electrical device
1997
69	5696660	Line current protection circuit for use with a PCMCIA-architecture modem card
70	5694460	Circuit and method for reducing common mode interference in telephone instruments
71	5661624	Foldback current limiting of a telephone line switch
72	5642416	AM broadcast band interference filter for line-powered telephone
73	5640451	Power cross detection using loop current and voltage
74	5638440	Protection circuit for telephone systems
75	5637011	Wire termination device
76	5606592	Method and apparatus for analyzing resistive faults on telephones cables
77	5602914	Device for limiting the working voltage for mechanical switches in telephony
78	5596470	Fault current protection circuit for an auxiliary device in a digital telephone system
1996
79	5553136	Modular device for telephone network interface apparatus
80	5539801	Removable telephone line protection module for an electronic device
81	5537471	Weatherproof telephone station protectors
82	5532898	Line current protection circuit for use with a PCMCIA-architecture modem card
83	5513059	Arrangement for protecting telecommunications equipment from voltage transients
84	5502760	Telephone-line dedicating apparatus
85	5500895	Telephone isolation device
86	5497417	Switching device for transmitting telecommunication signals
1995
87	5459783	Acoustic feedback suppression device particulary for auxiliary ringers in plug-in telephone systems
88	5448636	Device for limiting the working voltage mechanical switches in telephony
89	5416663	Arrangement for protecting telecommunications equipment from voltage transients
90	5402465	Telephone trouble isolator
91	5390231	Protection and recovery of telephone line interface circuits
1994
92	5359657	Telephone line overvoltage protection apparatus
93	5357568	Telephone line overvoltage protection method and apparatus
94	5347565	Order wire device having function for reducing noise in communication system having a plurality of order wire devices
95	5315651	Active surge rejection circuit
1993
96	5222131	Telephone protector including removable fuse holder
97	5208718	Protection circuit
1992
98	5172412	Subscriber circuit capable of suppressing in-phase induced noise
1991
99	5073924	Telephone line noise filter apparatus
1990
100	4971581	Connector guard for a telephone line overvoltage protection device
101	4947426	Telephone protection circuit
102	4926473	Longitudinal balance system
103	4896352	Telephone set circuit including an overvoltage protection
104	4893337	Circuit arrangement for a digital telephone station
1989
105	4876713	Signal circuit protector device for consumer use
106	4817204	Optical communication apparatus and method for telephone supervisory and audio signals
1988
107	4727571	Circuit for surge voltage protection in electronic telephone stations
1987
108	4634814	Surge protected electronic switch for telephone voiceband circuits
1986
109	4607142	Transformer flux compensation circuit
110	4571460	Active impedance line feed circuit with improved ground fault protection
1984
111	4449157	Surge protection for signal transmission systems
1983
112	4375015	Improved electronic hybrid circuit
1982
113	4357494	Impedance canceller circuit
114	4350964	Impedance generator circuit
1981
115	4283604	Current source circuits with common mode noise rejection
116	4264787	Hazardous voltage protection circuit
117	4254442	Circuit for the protection of telephone lines
1980
118	4213012	Discriminating means for telephone circuits
119	4203006	Direct access coupler
1979
120	4169215	Signal limiting circuit
121	4152549	Suppressor of spurious ringing currents for telephone apparatus
1978
122	4079211	Protection device for a subscriber's telephone set
123	4068282	Protective device for low current transmission circuits
1977
124	4048647	Solid state disconnect device
1976
125	3962664	Current protector
126	3961229	Two pair station protector
127	3947730	Telephone line surge protecting device
© 2017, ПАТ-Инфо, В.И. Карнышев Дата формирования списка: 03.04.2017