- All sections
- B - Performing operationstransporting
- B21C - Manufacture of metal sheets, wire, rods, tubes, profiles or like semi-manufactured products otherwise than by rollingauxiliary operations used in connection with metal-working without essentially removing material
- B21C 23/20 - Making uncoated products by backward extrusion
Patent holdings for IPC class B21C 23/20
Total number of patents in this class: 41
10-year publication summary
|
2
|
4
|
8
|
1
|
8
|
5
|
3
|
0
|
2
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| American Axle & Manufacturing, Inc. | 650 |
4 |
| North University of China | 99 |
3 |
| Battelle Memorial Institute | 2457 |
2 |
| National Machinery LLC | 42 |
2 |
| SMS Group GmbH | 1101 |
2 |
| Linhardt GmbH & Co. KG | 14 |
2 |
| Allite (Jiangsu) Magnesium Technology Co., Ltd. | 6 |
2 |
| Robert Bosch GmbH | 42272 |
1 |
| BIOTRONIK AG | 411 |
1 |
| Federal-Mogul Valvetrain GmbH | 63 |
1 |
| Leifeld Metal Spinning GmbH | 10 |
1 |
| Luxfer Gas Cylinders Limited | 23 |
1 |
| Magna International Inc. | 1216 |
1 |
| Manoir Industries | 5 |
1 |
| Neumayer Tekfor Holding GmbH | 76 |
1 |
| Schuler Pressen GmbH | 142 |
1 |
| SMS Meer GmbH | 66 |
1 |
| Suzhou Kunlun Advanced Manufacturing Technologies Equipment Co., Ltd. | 1 |
1 |
| ThyssenKrupp AG | 3242 |
1 |
| ThyssenKrupp Metalurgica Campo Limpo Ltda. | 21 |
1 |
| Other owners | 11 |