- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducersdeaf-aid setspublic address systems
- H04R 19/00 - Electrostatic transducers
Patent holdings for IPC class H04R 19/00
Total number of patents in this class: 1624
10-year publication summary
|
179
|
177
|
234
|
172
|
126
|
101
|
87
|
62
|
46
|
20
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Infineon Technologies AG | 8210 |
138 |
| Knowles Electronics, LLC | 600 |
116 |
| Robert Bosch GmbH | 42596 |
93 |
| InvenSense, Inc. | 1046 |
79 |
| Cirrus Logic, Inc. | 1771 |
71 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1929 |
54 |
| STMicroelectronics S.r.l. | 3621 |
46 |
| Cirrus Logic International Semiconductor Ltd. | 864 |
41 |
| TDK Corporation | 6689 |
40 |
| Weifang Goertek Microelectronics Co., Ltd. | 157 |
40 |
| MMI Semiconductor Co., Ltd. | 70 |
35 |
| Epcos AG | 702 |
21 |
| Taiwan Semiconductor Manufacturing Company, Ltd. | 42288 |
20 |
| Hitachi Medical Corporation | 617 |
18 |
| Hyundai Motor Company | 21795 |
18 |
| Sonion Nederland B.V. | 147 |
15 |
| Hitachi, Ltd. | 15462 |
14 |
| Olympus Corporation | 13196 |
14 |
| The Regents of the University of California | 19859 |
13 |
| USound GmbH | 83 |
13 |
| Other owners | 725 |