- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public address systems
- H04R 9/18 - Resonant transducers, i.e. adapted to produce maximum output at a predetermined frequency
Patent holdings for IPC class H04R 9/18
Total number of patents in this class: 31
10-year publication summary
|
2
|
2
|
3
|
4
|
3
|
2
|
6
|
4
|
3
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Goertek Inc. | 2477 |
3 |
| Skullcandy, Inc. | 399 |
3 |
| Harman Professional Inc | 86 |
3 |
| Samsung Electronics Co., Ltd. | 131630 |
2 |
| Clarion Co., Ltd. | 896 |
2 |
| Lofelt GmbH | 10 |
2 |
| Vivo Mobile Communication Co., Ltd. | 9833 |
2 |
| Apple Inc. | 50209 |
1 |
| Robert Bosch GmbH | 40953 |
1 |
| Hyundai Motor Company | 19021 |
1 |
| Kia Motors Corporation | 7946 |
1 |
| Cirrus Logic, Inc. | 1719 |
1 |
| Airmar Technology Corporation | 50 |
1 |
| Continental Engineering Services GmbH | 39 |
1 |
| Guangdong Oppo Mobile Telecommunications Corp., Ltd. | 18739 |
1 |
| Osseofon AB | 10 |
1 |
| Technische Universitat Kaiserslautern | 34 |
1 |
| Woojer LTD. | 28 |
1 |
| Shenzhen Shokz Co., Ltd. | 629 |
1 |
| Sound Solutions International (Zhenjiang) Co., Ltd. | 29 |
1 |
| Other owners | 1 |