Sound apparatus and vehicular apparatus including the same
US-2024422459-A1 · Dec 19, 2024 · US
Damping by means acting directly on free portion of diaphragm or cone (air damping H04R1/28)
Damping by means acting directly on free portion of diaphragm or cone (air damping H04R1/28) · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04R7/26 |
| Official title | Damping by means acting directly on free portion of diaphragm or cone (air damping H04R1/28) |
| Display label | Damping by means acting directly on free portion of diaphragm or cone (air damping H04R1/28) |
| Total patents | 269 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 10 |
| 2016 | 21 |
| 2017 | 21 |
| 2018 | 22 |
| 2019 | 11 |
| 2020 | 26 |
| 2021 | 31 |
| 2022 | 35 |
| 2023 | 36 |
| 2024 | 33 |
| 2025 | 16 |
| 2026 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Vibration or acceleration sensor applying squeeze film damping
US-2018364274-A1 · Dec 20, 2018 · US
Mems device and process
US-2018244516-A1 · Aug 30, 2018 · US
Film speaker
US-10051379-B2 · Aug 14, 2018 · US
Film Speaker
US-2018115832-A1 · Apr 26, 2018 · US
MEMS device and process
US-9926189-B2 · Mar 27, 2018 · US
Digital acoustic device with increased sound power
US-9900700-B2 · Feb 20, 2018 · US
Method of manufacturing a microphone
US-9866970-B2 · Jan 9, 2018 · US
Acoustic generator, acoustic generation device, and electronic apparatus
US-9848268-B2 · Dec 19, 2017 · US
Electro-acoustic driver and bobbin therefore
US-2017359656-A1 · Dec 14, 2017 · US
Vibration or acceleration sensor applying squeeze film damping
US-2017350916-A1 · Dec 7, 2017 · US
Ear-canal earpiece
US-9813807-B2 · Nov 7, 2017 · US
Speaker with a coil stabilizer and method for manufacturing the same
US-9807511-B2 · Oct 31, 2017 · US
Thin panel loudspeakers
US-2017295432-A1 · Oct 12, 2017 · US
Acoustic generator, acoustic generation device, and electronic apparatus
US-9781517-B2 · Oct 3, 2017 · US
In-plane overtravel stops for mems microphone
US-2017280263-A1 · Sep 28, 2017 · US
Controlling mechanical properties of a mems microphone with capacitive and piezoelectric electrodes
US-2017265009-A1 · Sep 14, 2017 · US
Method for producing an acoustical damping unit for an electro-acoustical transducer, acoustical damping unit and electro-acoustical transducer
US-2017257719-A1 · Sep 7, 2017 · US
Speaker and vibration control unit
US-9743192-B2 · Aug 22, 2017 · US
Mems device and process
US-2017217760-A1 · Aug 3, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04R7/26?
- CPC H04R7/26 is the Cooperative Patent Classification code for “Damping by means acting directly on free portion of diaphragm or cone (air damping H04R1/28).”
- How many patents are filed under CPC H04R7/26 (Damping by means acting directly on free portion of diaphragm or cone (air damping H04R1/28))?
- Our database includes 269 publications tagged with this CPC code.
- Is patent activity under CPC H04R7/26 growing?
- Publication counts under this code: 33 in 2024 vs 16 in 2025 (latest complete years).