Filter device
US-2025132481-A1 · Apr 24, 2025 · US
comprising one or more branching arms or cavities wholly outside the main waveguide
comprising one or more branching arms or cavities wholly outside the main waveguide · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01P1/209 |
| Official title | comprising one or more branching arms or cavities wholly outside the main waveguide |
| Display label | comprising one or more branching arms or cavities wholly outside the main waveguide |
| Total patents | 30 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2016 | 2 |
| 2017 | 2 |
| 2018 | 4 |
| 2019 | 3 |
| 2020 | 5 |
| 2021 | 3 |
| 2022 | 6 |
| 2023 | 2 |
| 2024 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Waveguide with a Curved-Wall Low-Pass Filter
US-2024387971-A1 · Nov 21, 2024 · US
Waveguide band-stop filter arrangement
US-11962055-B2 · Apr 16, 2024 · US
Millimeter-wave resonator and associated methods
US-11682819-B2 · Jun 20, 2023 · US
Filter and wireless communication system
US-11677127-B2 · Jun 13, 2023 · US
Waveguide band-stop filter arrangement
US-2022416386-A1 · Dec 29, 2022 · US
Filter and wireless communication system
US-2022181758-A1 · Jun 9, 2022 · US
Millimeter-wave resonator and associated methods
US-2022140463-A1 · May 5, 2022 · US
Multipaction-proof waveguide filter
US-11289784-B2 · Mar 29, 2022 · US
Multipaction-proof waveguide filter
US-2022013878-A1 · Jan 13, 2022 · US
Waveguide filter
US-11223095-B2 · Jan 11, 2022 · US
Group delay compensation filter
US-10992285-B2 · Apr 27, 2021 · US
Tunable waveguide filter input/output coupling arrangement
US-10964991-B2 · Mar 30, 2021 · US
Waveguide filter
US-2021028526-A1 · Jan 28, 2021 · US
Low-profile CTS flat-plate array antenna
US-10790592-B2 · Sep 29, 2020 · US
Coaxial wiring device and transmission/reception integrated splitter
US-10714804-B2 · Jul 14, 2020 · US
Group delay compensation filter
US-2020144994-A1 · May 7, 2020 · US
A tunable waveguide filter input/output coupling arrangement
US-2020014085-A1 · Jan 9, 2020 · US
Low-profile cts flat-plate array antenna
US-2020014116-A1 · Jan 9, 2020 · US
Coaxial wiring device and transmission/reception integrated splitter
US-2019288362-A1 · Sep 19, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01P1/209?
- CPC H01P1/209 is the Cooperative Patent Classification code for “comprising one or more branching arms or cavities wholly outside the main waveguide.”
- How many patents are filed under CPC H01P1/209 (comprising one or more branching arms or cavities wholly outside the main waveguide)?
- Our database includes 30 publications tagged with this CPC code.
- Is patent activity under CPC H01P1/209 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).