Open earphone
US-2024422466-A1 · Dec 19, 2024 · US
for loudspeaker transducers
for loudspeaker transducers · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04R1/2811 |
| Official title | {for loudspeaker transducers} |
| Display label | for loudspeaker transducers |
| Total patents | 1,432 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 33 |
| 2016 | 54 |
| 2017 | 82 |
| 2018 | 117 |
| 2019 | 128 |
| 2020 | 142 |
| 2021 | 158 |
| 2022 | 140 |
| 2023 | 184 |
| 2024 | 203 |
| 2025 | 145 |
| 2026 | 46 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Vehicle-mounted human-machine interaction system
US-2024395262-A1 · Nov 28, 2024 · US
Speaker Module
US-2024223941-A1 · Jul 4, 2024 · US
Speaker module and head-mounted device
US-2024205594-A1 · Jun 20, 2024 · US
Telescopic High SPL Speaker Enclosure
US-2024073569-A1 · Feb 29, 2024 · US
Mechanically actuated panel acoustic system
US-9525943-B2 · Dec 20, 2016 · US
Systems and methods for improved audio output in electronic devices
US-2016345098-A1 · Nov 24, 2016 · US
Earplug and electronic device using the same
US-9486365-B2 · Nov 8, 2016 · US
Speaker module for mobile device and mobile device having duct radiation structure
US-9479850-B2 · Oct 25, 2016 · US
One piece frame for a component in an electronic device
US-2016277819-A1 · Sep 22, 2016 · US
Sound Transducer Acoustic Back Cavity System
US-2016241950-A1 · Aug 18, 2016 · US
Customizable headphone audio driver assembly, headphone including such an audio driver assembly, and related methods
US-9414145-B2 · Aug 9, 2016 · US
Sound generator and electronic apparatus using the same
US-9402136-B2 · Jul 26, 2016 · US
Air Sensor with Air Flow Control
US-2016202224-A1 · Jul 14, 2016 · US
Electronic system and electronic device thereof
US-9374637-B2 · Jun 21, 2016 · US
Sealed Speaker System Having a Pressure Vent
US-2016173972-A1 · Jun 16, 2016 · US
Mechanically actuated panel acoustic system
US-2016150318-A1 · May 26, 2016 · US
Acoustic attenuation with adaptive impedance
US-2016146039-A1 · May 26, 2016 · US
Electronic device with micro speaker
US-2016127834-A1 · May 5, 2016 · US
Electroacoustic converter and electronic device
US-2016119720-A1 · Apr 28, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04R1/2811?
- CPC H04R1/2811 is the Cooperative Patent Classification code for “for loudspeaker transducers.”
- How many patents are filed under CPC H04R1/2811 (for loudspeaker transducers)?
- Our database includes 1,432 publications tagged with this CPC code.
- Is patent activity under CPC H04R1/2811 growing?
- Publication counts under this code: 203 in 2024 vs 145 in 2025 (latest complete years).