- All sections
- B - Performing operations; transporting
- B21D - Working or processing of sheet metal or metal tubes, rods or profiles without essentially removing material; punching metal
- B21D 53/12 - Making other particular articles valve seats or the like cages for bearings
Patent holdings for IPC class B21D 53/12
Total number of patents in this class: 82
10-year publication summary
|
9
|
12
|
7
|
7
|
7
|
8
|
8
|
0
|
3
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| NTN Corporation | 5008 |
21 |
| Aktiebolaget SKF | 2700 |
15 |
| Schaeffler Technologies AG & Co. KG | 8880 |
10 |
| Bowman International Limited | 29 |
7 |
| Temper Corporation | 41 |
5 |
| NSK Ltd. | 2719 |
4 |
| JTEKT Corporation | 2423 |
3 |
| Nakanishi Metal Works Co., Ltd. | 101 |
3 |
| Schaeffler Technologies GmbH & Co. KG | 846 |
2 |
| ThyssenKrupp Steel Europe AG | 924 |
2 |
| The Timken Company | 392 |
2 |
| AB SKF | 193 |
1 |
| Schaeffler Group USA, Inc. | 281 |
1 |
| Schaeffler KG | 960 |
1 |
| Wf-maschinenbau und Blechformtechnik GmbH & Co. KG | 14 |
1 |
| Wf-maschinenbau U. Blechformtechnik GmbH & Co. KG | 3 |
1 |
| HSP Schwahlen GmbH | 4 |
1 |
| Inno-Spin LLC | 13 |
1 |
| GKN Driveline Deutschland | 1 |
1 |
| Other owners | 0 |