Method and Electronic Circuit for Improving a Driving Force Function of an Electrodynamic Acoustic Transducer
US-2020342154-A1 · Oct 29, 2020 · US
Voice coil arrangements comprising more than one voice coil unit on the same bobbin
Voice coil arrangements comprising more than one voice coil unit on the same bobbin · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04R2209/041 |
| Official title | Voice coil arrangements comprising more than one voice coil unit on the same bobbin |
| Display label | Voice coil arrangements comprising more than one voice coil unit on the same bobbin |
| Total patents | 148 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 16 |
| 2017 | 8 |
| 2018 | 9 |
| 2019 | 7 |
| 2020 | 23 |
| 2021 | 26 |
| 2022 | 9 |
| 2023 | 12 |
| 2024 | 16 |
| 2025 | 6 |
| 2026 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Speaker
US-2020213748-A1 · Jul 2, 2020 · US
Audio processor
US-2020204919-A1 · Jun 25, 2020 · US
System and method for applying a sound signal to a multi coil electrodynamic acoustic transducer
US-10623865-B2 · Apr 14, 2020 · US
Speaker Integrated Electronic Device with Speaker Driven Passive Cooling
US-2020112792-A1 · Apr 9, 2020 · US
Dual-coil (differential drive) tactile transducer
US-2020107132-A1 · Apr 2, 2020 · US
Single-magnet double-tone-circuit coaxial loudspeaker
US-2020107112-A1 · Apr 2, 2020 · US
Electro-acoustic transducer diaphragm with integrated structural features, and related systems and methods
US-2020077199-A1 · Mar 5, 2020 · US
Speaker
US-2020045451-A1 · Feb 6, 2020 · US
Voice coil, method for winding voice coil, and speaker having voice coil
US-2020045454-A1 · Feb 6, 2020 · US
Speaker Assembly
US-2020045453-A1 · Feb 6, 2020 · US
Hybrid transducer
US-10516935-B2 · Dec 24, 2019 · US
Method for avoiding an offset of a membrane of a electrodynamic acoustic transducer
US-10397706-B2 · Aug 27, 2019 · US
Linear actuator
US-2019182601-A1 · Jun 13, 2019 · US
Speaker module
US-10250961-B2 · Apr 2, 2019 · US
Force balanced micro transducer array
US-10250994-B2 · Apr 2, 2019 · US
Speaker unit, speaker system, and method for adjusting vibration displacement of vibration diaphragm
US-2019037304-A1 · Jan 31, 2019 · US
Multi-coil loudspeaker driver
US-10194249-B2 · Jan 29, 2019 · US
Multi-Coil Loudspeaker Driver
US-2018367917-A1 · Dec 20, 2018 · US
Electroacoustic conversion chain with selectively powered coil
US-10142753-B2 · Nov 27, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04R2209/041?
- CPC H04R2209/041 is the Cooperative Patent Classification code for “Voice coil arrangements comprising more than one voice coil unit on the same bobbin.”
- How many patents are filed under CPC H04R2209/041 (Voice coil arrangements comprising more than one voice coil unit on the same bobbin)?
- Our database includes 148 publications tagged with this CPC code.
- Is patent activity under CPC H04R2209/041 growing?
- Publication counts under this code: 16 in 2024 vs 6 in 2025 (latest complete years).