- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public address systems
- H04R 19/00 - Electrostatic transducers
Patent holdings for IPC class H04R 19/00
Total number of patents in this class: 1611
10-year publication summary
177
|
179
|
177
|
234
|
172
|
126
|
101
|
85
|
60
|
16
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Infineon Technologies AG | 8189 |
136 |
Knowles Electronics, LLC | 597 |
116 |
Robert Bosch GmbH | 40953 |
86 |
InvenSense, Inc. | 1014 |
80 |
Cirrus Logic, Inc. | 1719 |
76 |
AAC Acoustic Technologies (Shenzhen) Co., Ltd. | 1827 |
52 |
STMicroelectronics S.r.l. | 3693 |
45 |
Cirrus Logic International Semiconductor Ltd. | 792 |
41 |
Weifang Goertek Microelectronics Co., Ltd. | 153 |
40 |
TDK Corporation | 6306 |
38 |
MMI Semiconductor Co., Ltd. | 70 |
35 |
Epcos AG | 778 |
22 |
Taiwan Semiconductor Manufacturing Company, Ltd. | 36809 |
19 |
Hitachi Medical Corporation | 713 |
18 |
Hyundai Motor Company | 19021 |
18 |
Olympus Corporation | 13667 |
17 |
Hitachi, Ltd. | 16452 |
14 |
Sonion Nederland B.V. | 138 |
14 |
The Regents of the University of California | 18943 |
13 |
Analog Devices, Inc. | 3475 |
13 |
Other owners | 718 |