- All sections
- B - Performing operations; transporting
- B29L - Indexing scheme associated with subclass , relating to particular articles
- B29L 31/38 - Loudspeaker cones; Acoustic diaphragms
Patent holdings for IPC class B29L 31/38
Total number of patents in this class: 14
10-year publication summary
|
1
|
1
|
3
|
3
|
2
|
0
|
2
|
1
|
1
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Goertek Inc. | 2477 |
4 |
| Bose Corporation | 2880 |
2 |
| Apple Inc. | 50209 |
1 |
| The Boeing Company | 19843 |
1 |
| Nokia Technologies Oy | 15057 |
1 |
| Concraft Holding Co., Ltd. | 17 |
1 |
| UPM-Kymmene Corporation | 868 |
1 |
| LK Products Oy | 1 |
1 |
| Tymphany Acoustic Technology Limited | 45 |
1 |
| Panasonic Automotive Systems Co., Ltd. | 1440 |
1 |
| Other owners | 0 |