Ultrasonic sensor
US-12555557-B2 · Feb 17, 2026 · US
Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04R13/00 |
| Official title | Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet |
| Display label | Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet |
| Total patents | 60 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 5 |
| 2017 | 4 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 7 |
| 2022 | 5 |
| 2023 | 10 |
| 2024 | 9 |
| 2025 | 5 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Conductive diaphragm and speaker using same
US-2026032389-A1 · Jan 29, 2026 · US
Method for manufacturing mems device including coil structure
US-2026008670-A1 · Jan 8, 2026 · US
Ultrasonic sensor
US-12449523-B2 · Oct 21, 2025 · US
MEMS device including coil structure with corrugated polymer film
US-12441606-B2 · Oct 14, 2025 · US
MEMS environmental sensor and preparation method therefor
US-12319565-B2 · Jun 3, 2025 · US
Electromechanical transducer
US-12289579-B2 · Apr 29, 2025 · US
Waterproof microspeaker
US-12267659-B2 · Apr 1, 2025 · US
Loudspeaker for hearing device
US-12143769-B2 · Nov 12, 2024 · US
Vibration generating device
US-12103040-B2 · Oct 1, 2024 · US
Electronic device and speaker device
US-2024251206-A1 · Jul 25, 2024 · US
Magnetic potential transducer and electronic apparatus using same
US-12010500-B2 · Jun 11, 2024 · US
Loudspeaker for hearing device
US-2024171916-A1 · May 23, 2024 · US
Mems device and method for manufacturing the same
US-2024158225-A1 · May 16, 2024 · US
Magnetic circuit structure of a transducer, a transducer and an electronic device comprising the same
US-11902764-B2 · Feb 13, 2024 · US
Ultrasonic sensor
US-2024038208-A1 · Feb 1, 2024 · US
Sealed acoustic speaker and medical device including same
US-11863923-B2 · Jan 2, 2024 · US
Hybrid speaker and converter
US-11832071-B2 · Nov 28, 2023 · US
Electromechanical transducer
US-2023370782-A1 · Nov 16, 2023 · US
Ultrasonic sensor
US-2023366999-A1 · Nov 16, 2023 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04R13/00?
- CPC H04R13/00 is the Cooperative Patent Classification code for “Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet.”
- How many patents are filed under CPC H04R13/00 (Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet)?
- Our database includes 60 publications tagged with this CPC code.
- Is patent activity under CPC H04R13/00 growing?
- Publication counts under this code: 9 in 2024 vs 5 in 2025 (latest complete years).