Patent holdings for IPC class H04R 31/00

Total number of patents in this class: 2444

10-year publication summary

237
236
303
212
182
182
183
130
105
7
2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

Principal owners for this class

Owner
All patents
This class
Goertek Inc.
2591
127
Infineon Technologies AG
8137
77
Bose Corporation
2921
63
AAC Acoustic Technologies (Shenzhen) Co., Ltd.
1878
54
Knowles Electronics, LLC
605
53
JPMorgan Chase Bank, National Association
8416
47
Apple Inc.
52750
46
AAC Technologies Pte. Ltd.
1440
46
TDK Corporation
6539
42
Shenzhen Shokz Co., Ltd.
933
33
Robert Bosch GmbH
41786
32
Murata Manufacturing Co., Ltd.
23702
28
Panasonic Corporation
20315
27
FUJIFILM Corporation
28805
27
STMicroelectronics S.r.l.
3654
27
Taiwan Semiconductor Manufacturing Company, Ltd.
40608
26
SAE Magnetics (H.K.) Ltd.
335
24
Hyundai Motor Company
20483
24
AAC Microtech (Changzhou) Co., Ltd.
630
22
Sonos, Inc.
2462
22
Other owners 1597