Rf source protection
US-2023380049-A1 · Nov 23, 2023 · US
suppressing or attenuating harmonic frequencies (H01P1/215 takes precedence)
suppressing or attenuating harmonic frequencies (H01P1/215 takes precedence) · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01P1/212 |
| Official title | suppressing or attenuating harmonic frequencies (H01P1/215 takes precedence) |
| Display label | suppressing or attenuating harmonic frequencies (H01P1/215 takes precedence) |
| Total patents | 71 |
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 | 6 |
| 2017 | 6 |
| 2018 | 6 |
| 2019 | 3 |
| 2020 | 8 |
| 2021 | 7 |
| 2022 | 11 |
| 2023 | 7 |
| 2024 | 5 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
High-frequency transmission line, radar apparatus provided with high-frequency transmission line, and wireless device
US-11799182-B2 · Oct 24, 2023 · US
Frequency selective coupler
US-2023275334-A1 · Aug 31, 2023 · US
Low pass filter, multilayer-type low pass filter, and method of adjusting filter characteristic
US-2023238934-A1 · Jul 27, 2023 · US
Dielectric filter, transceiver device, and base station
US-11664564-B2 · May 30, 2023 · US
Dual-band transform circuit structure
US-2023071502-A1 · Mar 9, 2023 · US
CWG Filter, and RU, AU or BS having the Same
US-2023067193-A1 · Mar 2, 2023 · US
Millimeter-wave antenna-in-package and terminal device
US-2022399644-A1 · Dec 15, 2022 · US
Filter circuit
US-2022399626-A1 · Dec 15, 2022 · US
Wireless communication module
US-11509345-B2 · Nov 22, 2022 · US
Substrate-integrated waveguide filtering crossover having a dual mode rectangular cavity coupled to eight single mode square cavities
US-11509031-B2 · Nov 22, 2022 · US
Power Amplifier with Harmonic Filter
US-2022360243-A1 · Nov 10, 2022 · US
Tunable radio frequency circuit, control method and electronic device including the same
US-11450935-B2 · Sep 20, 2022 · US
Power amplifier and filter
US-11381206-B2 · Jul 5, 2022 · US
Hybrid-harmonic waveguide filter including corrugations coupled by ridge interconnects and having sloped transformer sections
US-11374298-B1 · Jun 28, 2022 · US
Wireless communication module
US-2022190868-A1 · Jun 16, 2022 · US
Harmonic trap filter using coupled resonators
US-11283144-B2 · Mar 22, 2022 · US
Dielectric Filter, Transceiver Device, and Base Station
US-2022021095-A1 · Jan 20, 2022 · US
Dielectric filter, duplexer, and communications device
US-2021328315-A1 · Oct 21, 2021 · US
Dielectric filter, transceiver device, and base station
US-11139546-B2 · Oct 5, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01P1/212?
- CPC H01P1/212 is the Cooperative Patent Classification code for “suppressing or attenuating harmonic frequencies (H01P1/215 takes precedence).”
- How many patents are filed under CPC H01P1/212 (suppressing or attenuating harmonic frequencies (H01P1/215 takes precedence))?
- Our database includes 71 publications tagged with this CPC code.
- Is patent activity under CPC H01P1/212 growing?
- Publication counts under this code: 5 in 2024 vs 5 in 2025 (latest complete years).