Superconducting tunable inductance
US-2026074102-A1 · Mar 12, 2026 · US
Variable inductances or transformers of the signal type (H01F36/00 takes precedence)
Variable inductances or transformers of the signal type (H01F36/00 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 | H01F21/00 |
| Official title | Variable inductances or transformers of the signal type (H01F36/00 takes precedence) |
| Display label | Variable inductances or transformers of the signal type (H01F36/00 takes precedence) |
| Total patents | 42 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 5 |
| 2017 | 6 |
| 2018 | 5 |
| 2019 | 2 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 5 |
| 2024 | 2 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Stepped coax MIL PTHS for modulating inductance within a package
US-12381029-B2 · Aug 5, 2025 · US
Inductance adjustable inductor and signal transmission device including the same
US-2025201462-A1 · Jun 19, 2025 · US
Variable circuit
US-12283409-B2 · Apr 22, 2025 · US
Voltage converter
US-2024380324-A1 · Nov 14, 2024 · US
Electronic device having reconfigurable multi-coil transformer with frequency selective filtering
US-11881715-B2 · Jan 23, 2024 · US
Electronic Device Having Reconfigurable Multi-Coil Transformer with Frequency Selective Filtering
US-2023378808-A1 · Nov 23, 2023 · US
Variable circuit
US-2023370040-A1 · Nov 16, 2023 · US
Automatic calibration system and method for passive low-power voltage transformer
US-11817247-B2 · Nov 14, 2023 · US
Automatic calibration system and method for passive low-power voltage transformer
US-2023238165-A1 · Jul 27, 2023 · US
Superconducting current control system
US-11545288-B2 · Jan 3, 2023 · US
Inductive component and method for adjusting an inductance value
US-2022336150-A1 · Oct 20, 2022 · US
Coil former, inductive component and method for adjusting an inductance
US-2022256661-A1 · Aug 11, 2022 · US
Stepped coax mil pths for modulating inductance within a package
US-2022102055-A1 · Mar 31, 2022 · US
Superconducting tunable inductance
US-2021375516-A1 · Dec 2, 2021 · US
Superconducting current control system
US-2021327624-A1 · Oct 21, 2021 · US
Switch-type phase shifter
US-10734972-B1 · Aug 4, 2020 · US
Inductor circuit and wireless communication devices
US-10637528-B2 · Apr 28, 2020 · US
Novel inductor circuit and wireless communication devices
US-2020028536-A1 · Jan 23, 2020 · US
Differential inductor and semiconductor device including the same
US-10431543-B2 · Oct 1, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H01F21/00?
- CPC H01F21/00 is the Cooperative Patent Classification code for “Variable inductances or transformers of the signal type (H01F36/00 takes precedence).”
- How many patents are filed under CPC H01F21/00 (Variable inductances or transformers of the signal type (H01F36/00 takes precedence))?
- Our database includes 42 publications tagged with this CPC code.
- Is patent activity under CPC H01F21/00 growing?
- Publication counts under this code: 2 in 2024 vs 3 in 2025 (latest complete years).