Monitoring of vehicle window vibrations for voice-command recognition
US-10479300-B2 · Nov 19, 2019 · US
Transducers using more than one principle simultaneously
Transducers using more than one principle simultaneously · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04R23/02 |
| Official title | Transducers using more than one principle simultaneously |
| Display label | Transducers using more than one principle simultaneously |
| Total patents | 146 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 4 |
| 2017 | 14 |
| 2018 | 27 |
| 2019 | 16 |
| 2020 | 19 |
| 2021 | 15 |
| 2022 | 10 |
| 2023 | 18 |
| 2024 | 6 |
| 2025 | 12 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Hybrid audio system for eyewear devices
US-2019342647-A1 · Nov 7, 2019 · US
Hybrid Actuator
US-2019334076-A1 · Oct 31, 2019 · US
Electromechanical transducer with mechanical advantage
US-10448136-B2 · Oct 15, 2019 · US
Loudspeaker system
US-2019306631-A1 · Oct 3, 2019 · US
Micro-sound detection analysis device and array audio signal processing method based on same
US-10433072-B2 · Oct 1, 2019 · US
Electroacoustic transducer
US-10433073-B2 · Oct 1, 2019 · US
Recessed lighting systems
US-10408395-B2 · Sep 10, 2019 · US
Microphone diaphragm
US-10349178-B2 · Jul 9, 2019 · US
Sensor
US-10234429-B2 · Mar 19, 2019 · US
Speaker device
US-10237661-B2 · Mar 19, 2019 · US
Electrical-acoustic transformation device
US-10225664-B2 · Mar 5, 2019 · US
Electrical-acoustic transformation device
US-10219080-B2 · Feb 26, 2019 · US
Electroacoustic transducer
US-2019037319-A1 · Jan 31, 2019 · US
Method and system for parametric amplification
US-2018356707-A1 · Dec 13, 2018 · US
Speaker apparatus
US-10154336-B2 · Dec 11, 2018 · US
Apparatuses and methods for acoustically exciting a face panel of a stowage bin inside a vehicle
US-10142714-B2 · Nov 27, 2018 · US
Speaker device
US-10104466-B2 · Oct 16, 2018 · US
Electroacoustic transducer
US-2018249255-A1 · Aug 30, 2018 · US
Method and system for parametric amplification
US-10061181-B2 · Aug 28, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04R23/02?
- CPC H04R23/02 is the Cooperative Patent Classification code for “Transducers using more than one principle simultaneously.”
- How many patents are filed under CPC H04R23/02 (Transducers using more than one principle simultaneously)?
- Our database includes 146 publications tagged with this CPC code.
- Is patent activity under CPC H04R23/02 growing?
- Publication counts under this code: 6 in 2024 vs 12 in 2025 (latest complete years).