Variable inductor device comprising first and second planar loops configured to be separable by pivoting about a hinge
US-12488938-B2 · Dec 2, 2025 · US
Delay lines of the waveguide type
Delay lines of the waveguide type · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H01P9/00 |
| Official title | Delay lines of the waveguide type |
| Display label | Delay lines of the waveguide type |
| Total patents | 55 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 10 |
| 2017 | 5 |
| 2018 | 3 |
| 2020 | 5 |
| 2021 | 3 |
| 2022 | 7 |
| 2023 | 4 |
| 2024 | 5 |
| 2025 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Delay compensation in conductive trace structures
US-2025324509-A1 · Oct 16, 2025 · US
Methods and apparatus to structure waveguides for delays
US-2025279569-A1 · Sep 4, 2025 · US
Signal delay device with reduced size
US-12381545-B2 · Aug 5, 2025 · US
Multi-mode spiral delay device
US-2024402429-A1 · Dec 5, 2024 · US
Wiring board
US-2024397611-A1 · Nov 28, 2024 · US
Multi-mode spiral delay device
US-12066661-B2 · Aug 20, 2024 · US
Signal delay device with reduced size
US-2024128962-A1 · Apr 18, 2024 · US
Multi-mode spiral delay device
US-2024085631-A1 · Mar 14, 2024 · US
Base station antenna feed boards having RF transmission lines of different types for providing different transmission speeds
US-11855351-B2 · Dec 26, 2023 · US
Multi-mode spiral delay device
US-11789205-B1 · Oct 17, 2023 · US
Slow wave structure for millimeter wave antennas
US-11715889-B2 · Aug 1, 2023 · US
Circulator-based tunable delay line
US-11621465-B2 · Apr 4, 2023 · US
Transmission cable
US-2022334306-A1 · Oct 20, 2022 · US
Variable inductor device
US-2022230802-A1 · Jul 21, 2022 · US
Multi-mode spiral delay device
US-11391890-B1 · Jul 19, 2022 · US
Base station antenna feed boards having rf transmission lines having different transmission speeds
US-2022190486-A1 · Jun 16, 2022 · US
Antenna module including compensator for compensating electrical path difference and electronic device including the same
US-11283188-B2 · Mar 22, 2022 · US
Liquid crystal phase shifter comprising a liquid crystal cell with first and second substrates separated by a partition plate having first and second microstrips on opposing surfaces of the plate
US-11264684-B2 · Mar 1, 2022 · US
Slow wave structure for millimeter wave antennas
US-2022037803-A1 · Feb 3, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01P9/00?
- CPC H01P9/00 is the Cooperative Patent Classification code for “Delay lines of the waveguide type.”
- How many patents are filed under CPC H01P9/00 (Delay lines of the waveguide type)?
- Our database includes 55 publications tagged with this CPC code.
- Is patent activity under CPC H01P9/00 growing?
- Publication counts under this code: 5 in 2024 vs 4 in 2025 (latest complete years).