- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public address systems
- H04R 1/28 - Transducer mountings or enclosures designed for specific frequency response; Transducer enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
Patent holdings for IPC class H04R 1/28
Total number of patents in this class: 3100
10-year publication summary
|
174
|
244
|
327
|
352
|
379
|
363
|
360
|
339
|
341
|
126
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Bose Corporation | 2880 |
228 |
| Samsung Electronics Co., Ltd. | 131630 |
182 |
| Apple Inc. | 50209 |
166 |
| Shenzhen Shokz Co., Ltd. | 629 |
157 |
| Goertek Inc. | 2477 |
118 |
| AAC Technologies Pte. Ltd. | 1436 |
80 |
| LG Display Co., Ltd. | 11907 |
62 |
| Yamaha Corporation | 4054 |
57 |
| Harman International Industries, Incorporated | 2443 |
57 |
| AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1827 |
46 |
| AAC Microtech (Changzhou) Co., Ltd. | 458 |
44 |
| LG Electronics Inc. | 69257 |
34 |
| Kyocera Corporation | 12735 |
33 |
| Sony Corporation | 32931 |
32 |
| Nokia Technologies Oy | 15057 |
28 |
| Panasonic Intellectual Property Management Co., Ltd. | 27812 |
27 |
| Pioneer Corporation | 4843 |
27 |
| SSI New Material (Zhenjiang) Co., Ltd. | 40 |
26 |
| Tohoku Pioneer Corporation | 477 |
24 |
| Sonos, Inc. | 2274 |
24 |
| Other owners | 1648 |