- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public address systems
- H04R 19/01 - Electrostatic transducers characterised by the use of electrets
Patent holdings for IPC class H04R 19/01
Total number of patents in this class: 320
10-year publication summary
|
37
|
34
|
23
|
32
|
29
|
20
|
25
|
14
|
16
|
2
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Robert Bosch GmbH | 40953 |
14 |
| Knowles Electronics, LLC | 597 |
14 |
| Shure Acquisition Holdings, Inc. | 449 |
13 |
| Infineon Technologies AG | 8189 |
12 |
| STMicroelectronics S.r.l. | 3693 |
8 |
| Sennheiser electronic GmbH & Co. KG | 472 |
8 |
| Wing Acoustics Limited | 19 |
8 |
| Panasonic Corporation | 20786 |
7 |
| Goertek Inc. | 2477 |
7 |
| Hosiden Corporation | 428 |
7 |
| InvenSense, Inc. | 1014 |
7 |
| Sonion Nederland B.V. | 138 |
7 |
| Omron Corporation | 6968 |
6 |
| Matsushita Electric Industrial Co., Ltd. | 4724 |
5 |
| Epcos AG | 778 |
5 |
| Asahi Glass Company, Limited | 2985 |
5 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1827 |
5 |
| Kaetel Systems GmbH | 33 |
5 |
| National University Corporation Shizuoka University | 378 |
5 |
| TDK Corporation | 6306 |
4 |
| Other owners | 168 |