- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducers; deaf-aid sets; public address systems
- H04R 1/38 - Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means in which sound waves act upon both sides of a diaphragm and incorporating acoustic phase-shifting means, e.g. pressure-gradient microphone
Patent holdings for IPC class H04R 1/38
Total number of patents in this class: 140
10-year publication summary
7
|
10
|
5
|
12
|
10
|
5
|
31
|
8
|
18
|
1
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Shenzhen Shokz Co., Ltd. | 629 |
42 |
Funai Electric Co., Ltd. | 882 |
15 |
Bose Corporation | 2880 |
10 |
Funai Electric Advanced Applied Technology Research Institute Inc. | 18 |
6 |
Shure Acquisition Holdings, Inc. | 449 |
6 |
Sonion Nederland B.V. | 138 |
6 |
AKG Acoustics GmbH | 61 |
5 |
Harman International Industries, Incorporated | 2443 |
4 |
Starkey Laboratories, Inc. | 1160 |
4 |
Goertek Inc. | 2477 |
3 |
Sennheiser electronic GmbH & Co. KG | 472 |
3 |
Microsoft Technology Licensing, LLC | 51439 |
2 |
Hosiden Corporation | 428 |
2 |
Brane Audio, LLC | 46 |
2 |
Soundskrit Inc. | 13 |
2 |
BlackBerry Limited | 5958 |
1 |
Siemens AG | 24990 |
1 |
Hewlett-Packard Development Company, L.P. | 28538 |
1 |
Fujitsu Limited | 19265 |
1 |
Hyundai Motor Company | 19021 |
1 |
Other owners | 23 |