- All sections
- B - Performing operationstransporting
- B29L - Indexing scheme associated with subclass , relating to particular articles
- B29L 31/04 - Bearings
Patent holdings for IPC class B29L 31/04
Total number of patents in this class: 49
10-year publication summary
|
7
|
9
|
6
|
6
|
3
|
5
|
1
|
3
|
3
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NTN Corporation | 4976 |
5 |
| Aktiebolaget SKF | 2839 |
5 |
| NSK Ltd. | 2738 |
3 |
| APQ Development, LLC | 11 |
2 |
| Diamet Corporation | 89 |
2 |
| Nakanishi Metal Works Co., Ltd. | 110 |
2 |
| Agc, Inc. | 4470 |
2 |
| Ricoh Company, Ltd. | 13216 |
1 |
| GM Global Technology Operations LLC | 14260 |
1 |
| Northrop Grumman Systems Corporation | 2921 |
1 |
| JTEKT Corporation | 2443 |
1 |
| Mitsubishi Rayon Co., Ltd. | 944 |
1 |
| Mitsubishi Chemical Corporation | 4447 |
1 |
| AGC Chemicals Americas, Inc. | 42 |
1 |
| Behr-Hella Thermocontrol GmbH | 139 |
1 |
| Benteler Automobiltechnik GmbH | 267 |
1 |
| NHK Spring Co., Ltd. | 1769 |
1 |
| Safran Aircraft Engines | 6039 |
1 |
| Segos Co., Ltd. | 111 |
1 |
| SGL Carbon SE | 386 |
1 |
| Other owners | 15 |