- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducersdeaf-aid setspublic 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: 33
10-year publication summary
|
3
|
4
|
3
|
2
|
6
|
4
|
3
|
1
|
0
|
1
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Goertek Inc. | 2821 |
3 |
| Skullcandy, Inc. | 381 |
3 |
| Harman Professional Inc | 87 |
3 |
| Samsung Electronics Co., Ltd. | 157719 |
2 |
| Clarion Co., Ltd. | 756 |
2 |
| Lofelt GmbH | 9 |
2 |
| Vivo Mobile Communication Co., Ltd. | 13657 |
2 |
| Apple Inc. | 58742 |
1 |
| Robert Bosch GmbH | 44160 |
1 |
| Hyundai Motor Company | 24653 |
1 |
| Kia Motors Corporation | 7718 |
1 |
| Cirrus Logic, Inc. | 1805 |
1 |
| Airmar Technology Corporation | 63 |
1 |
| Cochlear Limited | 1998 |
1 |
| Continental Engineering Services GmbH | 42 |
1 |
| Guangdong Oppo Mobile Telecommunications Corp., Ltd. | 23285 |
1 |
| Harman International Industries, Incorporated | 2877 |
1 |
| Osseofon AB | 8 |
1 |
| Technische Universitat Kaiserslautern | 28 |
1 |
| Woojer LTD. | 34 |
1 |
| Other owners | 3 |