- All sections
- B - Performing operationstransporting
- B21K - Making forged or pressed metal products, e.g. horse-shoes, rivets, bolts or wheels
- B21K 1/04 - Making machine elements ball-races
Patent holdings for IPC class B21K 1/04
Total number of patents in this class: 63
10-year publication summary
|
7
|
6
|
6
|
2
|
2
|
2
|
3
|
3
|
3
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NSK Ltd. | 2784 |
21 |
| Hatebur Umformmaschinen AG | 39 |
6 |
| Schaeffler Technologies AG & Co. KG | 9908 |
5 |
| NTN Corporation | 4973 |
5 |
| Aktiebolaget SKF | 2953 |
3 |
| Inno-Spin LLC | 13 |
2 |
| Seiko Instruments Inc. | 498 |
1 |
| Nidec Corporation | 2665 |
1 |
| Nippon Steel Corporation | 6274 |
1 |
| Nippon Steel & Sumitomo Metal Corporation | 1988 |
1 |
| Nippon Thompson Co., Ltd. | 219 |
1 |
| SANYO Special Steel Co., Ltd. | 223 |
1 |
| Schaeffler KG | 699 |
1 |
| Schuler Pressen GmbH | 132 |
1 |
| ThyssenKrupp AG | 3291 |
1 |
| ThyssenKrupp Presta AG | 1104 |
1 |
| TRW Automotive GmbH | 566 |
1 |
| US Synthetic Corporation | 622 |
1 |
| Wieland-Werke AG | 343 |
1 |
| Neumayer Tekfor Engineering GmbH | 50 |
1 |
| Other owners | 7 |