Playback devices having waveguides
US-12501205-B2 · Dec 16, 2025 · US
by using a single aperture of dimensions not greater than the shortest operating wavelength
by using a single aperture of dimensions not greater than the shortest operating wavelength · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H04R1/36 |
| Official title | by using a single aperture of dimensions not greater than the shortest operating wavelength |
| Display label | by using a single aperture of dimensions not greater than the shortest operating wavelength |
| Total patents | 33 |
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 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 4 |
| 2020 | 7 |
| 2021 | 4 |
| 2022 | 6 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Compression loaded slit shaped waveguide
US-2025193586-A1 · Jun 12, 2025 · US
Compression loaded slit shaped waveguide
US-12262172-B2 · Mar 25, 2025 · US
Playback devices having waveguides
US-12035101-B2 · Jul 9, 2024 · US
Playback Devices Having Waveguides
US-2024171903-A1 · May 23, 2024 · US
Compression Loaded Slit Shaped Waveguide
US-2023379618-A1 · Nov 23, 2023 · US
Playback Devices Having Waveguides
US-2023319461-A1 · Oct 5, 2023 · US
Electronic apparatus
US-11678110-B2 · Jun 13, 2023 · US
Playback devices having waveguides
US-11483643-B2 · Oct 25, 2022 · US
Acoustic transducers for microphone assemblies having non-circular apertures
US-11483645-B2 · Oct 25, 2022 · US
Electronic apparatus
US-2022321994-A1 · Oct 6, 2022 · US
Display apparatus
US-11314476-B2 · Apr 26, 2022 · US
Loudspeaker and sound outputting apparatus having the same
US-11259114-B2 · Feb 22, 2022 · US
Mobile terminal
US-2022046121-A1 · Feb 10, 2022 · US
Display apparatus
US-2021200504-A1 · Jul 1, 2021 · US
Loudspeaker and sound outputting apparatus having the same
US-2021136488-A1 · May 6, 2021 · US
Wearable speaker and reproduction apparatus
US-10986442-B2 · Apr 20, 2021 · US
Playback Devices Having Waveguides
US-2021078551-A1 · Mar 18, 2021 · US
Acoustic transducers for microphone assemblies having non-circular apertures
US-2020389723-A1 · Dec 10, 2020 · US
Speaker box
US-10848843-B2 · Nov 24, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC H04R1/36?
- CPC H04R1/36 is the Cooperative Patent Classification code for “by using a single aperture of dimensions not greater than the shortest operating wavelength.”
- How many patents are filed under CPC H04R1/36 (by using a single aperture of dimensions not greater than the shortest operating wavelength)?
- Our database includes 33 publications tagged with this CPC code.
- Is patent activity under CPC H04R1/36 growing?
- Publication counts under this code: 2 in 2024 vs 3 in 2025 (latest complete years).