- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public 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: 347
10-year publication summary
|
23
|
27
|
39
|
45
|
29
|
42
|
54
|
32
|
39
|
11
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Shenzhen Shokz Co., Ltd. | 629 |
48 |
| GoPro, Inc. | 1915 |
17 |
| Apple Inc. | 50209 |
16 |
| Amogreentech Co., Ltd. | 566 |
12 |
| Atlas Elektronik GmbH | 395 |
12 |
| Samsung Electronics Co., Ltd. | 131630 |
11 |
| Nitto Denko Corporation | 7879 |
8 |
| Teledyne Instruments, Inc. | 245 |
8 |
| Finnovate Group LLC | 20 |
7 |
| Raytheon Company | 8535 |
6 |
| W. L. Gore & Associates, Inc. | 2600 |
6 |
| The United States of America as represented by the Secretary of the Navy | 2734 |
5 |
| Goertek Inc. | 2477 |
5 |
| Massachusetts Institute of Technology | 9795 |
4 |
| PGS Geophysical AS | 547 |
4 |
| ThyssenKrupp AG | 3086 |
4 |
| Innogrity Pte Ltd | 8 |
4 |
| Sony Corporation | 32931 |
3 |
| Lockheed Martin Corporation | 3406 |
3 |
| Bose Corporation | 2880 |
3 |
| Other owners | 161 |