Methods and equipment for reducing power loss in radio systems
US-2025239935-A1 · Jul 24, 2025 · US
Current-supply circuits or arrangements for selection equipment at exchanges
Current-supply circuits or arrangements for selection equipment at exchanges · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04Q1/28 |
| Official title | Current-supply circuits or arrangements for selection equipment at exchanges |
| Display label | Current-supply circuits or arrangements for selection equipment at exchanges |
| Total patents | 51 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 10 |
| 2017 | 3 |
| 2018 | 9 |
| 2019 | 12 |
| 2020 | 7 |
| 2021 | 3 |
| 2023 | 1 |
| 2024 | 3 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods and equipment for reducing power loss in radio systems
US-12301107-B2 · May 13, 2025 · US
Optical-line terminating device and optical communications system
US-2025080885-A1 · Mar 6, 2025 · US
Methods and equipment for reducing power loss in radio systems
US-2024120834-A1 · Apr 11, 2024 · US
Remote communication and powered sensing/control/identification devices using high temperature compatible semiconductor materials
US-11937031-B2 · Mar 19, 2024 · US
Systems and methods to remove input voltage dependency in a power converter
US-11881775-B2 · Jan 23, 2024 · US
Methods and equipment for reducing power loss in cellular systems
US-11818518-B2 · Nov 14, 2023 · US
Systems and methods to remove input voltage dependency in a power converter
US-2021359604-A1 · Nov 18, 2021 · US
Remote communication and powered sensing/control/identification devices using high temperature compatible semiconductor materials
US-2021345021-A1 · Nov 4, 2021 · US
Remote communication and powered sensing/control/identification devices using high temperature compatible semiconductor materials
US-11089389-B2 · Aug 10, 2021 · US
Control of power to radio equipment using gravity enhanced level
US-2020359328-A1 · Nov 12, 2020 · US
Methods and equipment for reducing power loss in cellular systems
US-2020351574-A1 · Nov 5, 2020 · US
Remote communication and powered sensing/control/identification devices using high temperature compatible semiconductor materials
US-2020145738-A1 · May 7, 2020 · US
Network switches configured to employ optical or electrical interfaces
US-10645027-B2 · May 5, 2020 · US
Component counterfeit prevention
US-10638207-B2 · Apr 28, 2020 · US
System, devices, and method for on-body data and power transmission
US-10567152-B2 · Feb 18, 2020 · US
Metal ceramic composite for electromagnetic signal transparent materials
US-10531166-B2 · Jan 7, 2020 · US
Automatic grid mapping through timing
US-10506692-B2 · Dec 10, 2019 · US
Rack level network switch
US-10499531-B2 · Dec 3, 2019 · US
Characterization of single or multiple devices in a system
US-10491970-B2 · Nov 26, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04Q1/28?
- CPC H04Q1/28 is the Cooperative Patent Classification code for “Current-supply circuits or arrangements for selection equipment at exchanges.”
- How many patents are filed under CPC H04Q1/28 (Current-supply circuits or arrangements for selection equipment at exchanges)?
- Our database includes 51 publications tagged with this CPC code.
- Is patent activity under CPC H04Q1/28 growing?
- Publication counts under this code: 3 in 2024 vs 3 in 2025 (latest complete years).