- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducersdeaf-aid setspublic address systems
- H04R 1/38 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
Patent holdings for IPC class H04R 1/38
Total number of patents in this class: 153
10-year publication summary
|
10
|
5
|
12
|
10
|
5
|
32
|
8
|
18
|
8
|
5
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Shenzhen Shokz Co., Ltd. | 1106 |
53 |
| Funai Electric Co., Ltd. | 526 |
15 |
| Bose Corporation | 2984 |
10 |
| Funai Electric Advanced Applied Technology Research Institute Inc. | 18 |
6 |
| Shure Acquisition Holdings, Inc. | 521 |
6 |
| Sonion Nederland B.V. | 147 |
6 |
| AKG Acoustics GmbH | 55 |
5 |
| Goertek Inc. | 2654 |
4 |
| Harman International Industries, Incorporated | 2639 |
4 |
| Starkey Laboratories, Inc. | 1257 |
4 |
| Sennheiser electronic GmbH & Co. KG | 295 |
3 |
| Microsoft Technology Licensing, LLC | 53667 |
2 |
| Hosiden Corporation | 382 |
2 |
| Brane Audio, LLC | 59 |
2 |
| Soundskrit Inc. | 26 |
2 |
| BlackBerry Limited | 5148 |
1 |
| Siemens AG | 24518 |
1 |
| Hewlett-Packard Development Company, L.P. | 25887 |
1 |
| Fujitsu Limited | 18341 |
1 |
| Hyundai Motor Company | 21938 |
1 |
| Other owners | 24 |