- All sections
- H - Electricity
- H04R - Loudspeakers, microphones, gramophone pick-ups or like acoustic electromechanical transducersdeaf-aid setspublic address systems
- H04R 27/04 - Electric megaphones
Patent holdings for IPC class H04R 27/04
Total number of patents in this class: 24
10-year publication summary
|
4
|
0
|
3
|
3
|
3
|
8
|
4
|
1
|
2
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Roku, Inc. | 1605 |
6 |
| Robert Bosch GmbH | 44160 |
2 |
| Harman International Industries, Incorporated | 2877 |
2 |
| Shenzhen Teana Technology Co., Ltd., | 14 |
2 |
| The United States of America as represented by the Secretary of the Navy | 2858 |
1 |
| Cerberus Black Ltd | 6 |
1 |
| Creative Technology Ltd | 447 |
1 |
| D. Wheatley Enterprises, Inc. | 26 |
1 |
| Nielsen-Kellerman Co. | 57 |
1 |
| Pioneer dj Corporation | 56 |
1 |
| Sennheiser electronic GmbH & Co. KG | 275 |
1 |
| Deremyr Technology (Beijing) Co., LTD | 2 |
1 |
| Shenzhen Shokz Co., Ltd. | 1410 |
1 |
| Iyo Inc. | 55 |
1 |
| HL Klemove Corp. | 633 |
1 |
| Hongrijia Depurate Facility Science & Technology Co., Ltd. | 1 |
1 |
| Other owners | 0 |