Methods, systems and apparatus for selectively distributing urgent public information
US-10362468-B2 · Jul 23, 2019 · US
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Interface circuits for subscriber lines (current supply H04M19/00 and subgroups; supervisory, monitoring or testing arrangements H04M3/22 and subgroups; in key telephone systems H04M9/006)
Interface circuits for subscriber lines (current supply H04M19/00 and subgroups; supervisory, monitoring or testing arrangements H04M3/22 and subgroups; in key telephone systems H04M9/006) · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04M3/005 |
| Official title | {Interface circuits for subscriber lines (current supply H04M19/00 and subgroups; supervisory, monitoring or testing arrangements H04M3/22 and subgroups; in key telephone systems H04M9/006)} |
| Display label | Interface circuits for subscriber lines (current supply H04M19/00 and subgroups; supervisory, monitoring or testing arrangements H04M3/22 and subgroups; in key telephone systems H04M9/006) |
| Total patents | 18 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 3 |
| 2019 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Network telephone device, external connection card and communication method therefor
US-10362175-B2 · Jul 23, 2019 · US
Methods, systems and apparatus for providing video transmissions over multiple media
US-10327039-B2 · Jun 18, 2019 · US
Protection of a telephone line against overvoltages
US-10148810-B2 · Dec 4, 2018 · US
Network telephone device, external connection card and communication method therefor
US-2018309877-A1 · Oct 25, 2018 · US
Hybrid coil circuit
US-9948004-B2 · Apr 17, 2018 · US
Communication systems and methods for using shared channels to increase peak data rates
US-9742905-B1 · Aug 22, 2017 · US
Base of cordless digital telephone set, cordless digital telephone set, and voice data transmitting method
US-9699293-B2 · Jul 4, 2017 · US
Hybrid coil circuit
US-2017125902-A1 · May 4, 2017 · US
Protection of a telephone line against overvoltages
US-2017019526-A1 · Jan 19, 2017 · US
Base of Cordless Digital Telephone Set, Cordless Digital Telephone Set, and Voice Data Transmitting Method
US-2016344857-A1 · Nov 24, 2016 · US
Method for optimising electrical consumption of a residential gateway
US-9325859-B2 · Apr 26, 2016 · US
Telecommunications equipment
US-9210105-B2 · Dec 8, 2015 · US
Communication system
US-9143607-B2 · Sep 22, 2015 · US
Communication system
US-9042529-B2 · May 26, 2015 · US
Method and apparatus for vectoring adsl2 lines
US-2015104001-A1 · Apr 16, 2015 · US
Communication line testing with protective devices in place
US-8995623-B2 · Mar 31, 2015 · US
Methods and systems for controlling a user device in a telecommunication network
US-8983049-B2 · Mar 17, 2015 · US