- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducersdeaf-aid setspublic address systems
- H04R 1/44 - Special adaptations for subaqueous use, e.g. for hydrophone
Patent holdings for IPC class H04R 1/44
Total number of patents in this class: 374
10-year publication summary
|
27
|
39
|
45
|
29
|
42
|
57
|
32
|
39
|
35
|
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. | 982 |
59 |
| GoPro, Inc. | 1913 |
18 |
| Apple Inc. | 53280 |
17 |
| Samsung Electronics Co., Ltd. | 140622 |
14 |
| Amogreentech Co., Ltd. | 597 |
12 |
| Atlas Elektronik GmbH | 395 |
10 |
| Teledyne Instruments, Inc. | 235 |
9 |
| Finnovate Group LLC | 28 |
9 |
| Nitto Denko Corporation | 8113 |
8 |
| Raytheon Company | 8426 |
6 |
| W. L. Gore & Associates, Inc. | 2697 |
6 |
| Goertek Inc. | 2610 |
6 |
| ThyssenKrupp AG | 3227 |
5 |
| Massachusetts Institute of Technology | 9956 |
4 |
| The United States of America as represented by the Secretary of the Navy | 2732 |
4 |
| PGS Geophysical AS | 535 |
4 |
| Innogrity Pte Ltd | 8 |
4 |
| Sony Corporation | 31467 |
3 |
| Lockheed Martin Corporation | 3302 |
3 |
| Casio Computer Co., Ltd. | 3388 |
3 |
| Other owners | 170 |