- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public address systems
- H04R 7/04 - Plane diaphragms
Patent holdings for IPC class H04R 7/04
Total number of patents in this class: 1465
10-year publication summary
114
|
114
|
89
|
143
|
138
|
199
|
145
|
132
|
152
|
49
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Kyocera Corporation | 12735 |
156 |
LG Display Co., Ltd. | 11907 |
97 |
Google LLC | 38759 |
58 |
Goertek Inc. | 2477 |
56 |
Samsung Electronics Co., Ltd. | 131630 |
33 |
AAC Technologies Pte. Ltd. | 1436 |
31 |
Murata Manufacturing Co., Ltd. | 22355 |
29 |
Agc, Inc. | 4029 |
29 |
Yamaha Corporation | 4054 |
28 |
AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1827 |
27 |
Bose Corporation | 2880 |
24 |
FUJIFILM Corporation | 27102 |
23 |
Sony Corporation | 32931 |
21 |
Sony Group Corporation | 10730 |
20 |
Samsung Display Co., Ltd. | 30585 |
18 |
University of Rochester | 1243 |
18 |
Panasonic Intellectual Property Management Co., Ltd. | 27812 |
16 |
Apple Inc. | 50209 |
15 |
Pioneer Corporation | 4843 |
15 |
Nokia Technologies Oy | 15057 |
15 |
Other owners | 736 |