Open earphone
US-2024422466-A1 · Dec 19, 2024 · US
by using a single transducer with sound reflecting, diffracting, directing or guiding means {(specially adapted for hearing aids H04R25/402)}
by using a single transducer with sound reflecting, diffracting, directing or guiding means {(specially adapted for hearing aids H04R25/402)} · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04R1/34 |
| Official title | by using a single transducer with sound reflecting, diffracting, directing or guiding means {(specially adapted for hearing aids H04R25/402)} |
| Display label | by using a single transducer with sound reflecting, diffracting, directing or guiding means {(specially adapted for hearing aids H04R25/402)} |
| Total patents | 335 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 13 |
| 2016 | 21 |
| 2017 | 24 |
| 2018 | 18 |
| 2019 | 28 |
| 2020 | 31 |
| 2021 | 43 |
| 2022 | 27 |
| 2023 | 54 |
| 2024 | 40 |
| 2025 | 30 |
| 2026 | 6 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Upward firing loudspeaker having asymmetric dispersion for reflected sound rendering
US-2018242077-A1 · Aug 23, 2018 · US
Mems transducer package
US-2017374441-A1 · Dec 28, 2017 · US
Acoustic tunable speaker device
US-9854352-B2 · Dec 26, 2017 · US
Earphone device
US-9826300-B2 · Nov 21, 2017 · US
Method and apparatus for obtaining vibration information and user equipment
US-2017322306-A1 · Nov 9, 2017 · US
Ultrasonic transducer with emitting element
US-2017307426-A1 · Oct 26, 2017 · US
Omni-directional speaker system and related devices and methods
US-2017303034-A1 · Oct 19, 2017 · US
Mobile device acoustic divider
US-9762997-B2 · Sep 12, 2017 · US
Device and method for adjusting an output to an audio port based on a determined sensitivity
US-2017257716-A1 · Sep 7, 2017 · US
Smartpen configured for hands free audio recording
US-9736561-B2 · Aug 15, 2017 · US
Energy conversion apparatus and speaker structure
US-9736576-B2 · Aug 15, 2017 · US
Orientation-responsive acoustic array control
US-9736612-B2 · Aug 15, 2017 · US
Orientation-Responsive Acoustic Array Control
US-2017180852-A1 · Jun 22, 2017 · US
Acoustic tunable speaker device
US-2017156004-A1 · Jun 1, 2017 · US
Flat-panel acoustic apparatus
US-9661414-B2 · May 23, 2017 · US
Ultrasonic lens for receiver application
US-2017110109-A1 · Apr 20, 2017 · US
Acoustic Device
US-2017111733-A1 · Apr 20, 2017 · US
Three hundred and sixty degree horn for omnidirectional loudspeaker
US-2017094406-A1 · Mar 30, 2017 · US
Acoustic deflector for omni-directional speaker system
US-2017085983-A1 · Mar 23, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04R1/34?
- CPC H04R1/34 is the Cooperative Patent Classification code for “by using a single transducer with sound reflecting, diffracting, directing or guiding means {(specially adapted for hearing aids H04R25/402)}.”
- How many patents are filed under CPC H04R1/34 (by using a single transducer with sound reflecting, diffracting, directing or guiding means {(specially adapted for hearing aids H04R25/402)})?
- Our database includes 335 publications tagged with this CPC code.
- Is patent activity under CPC H04R1/34 growing?
- Publication counts under this code: 40 in 2024 vs 30 in 2025 (latest complete years).