- 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: 47
10-year publication summary
|
4
|
8
|
1
|
8
|
5
|
3
|
0
|
3
|
3
|
3
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| American Axle & Manufacturing, Inc. | 629 |
4 |
| National Machinery LLC | 43 |
4 |
| North University of China | 142 |
3 |
| SMS Group GmbH | 1208 |
3 |
| Battelle Memorial Institute | 2610 |
2 |
| Tyco Fire & Security GmbH | 3672 |
2 |
| York (Wuxi) Air Conditioning and Refrigeration Co. , Ltd. | 64 |
2 |
| Linhardt Viechtach GmbH & Co. KG | 21 |
2 |
| Robert Bosch GmbH | 44291 |
1 |
| BIOTRONIK AG | 446 |
1 |
| Federal-Mogul Valvetrain GmbH | 62 |
1 |
| Leifeld Metal Spinning GmbH | 9 |
1 |
| Luxfer Gas Cylinders Limited | 19 |
1 |
| Magna International Inc. | 1174 |
1 |
| Phoenix Contact GmbH & Co. KG | 2295 |
1 |
| Schuler Pressen GmbH | 131 |
1 |
| SMS Meer GmbH | 59 |
1 |
| Suzhou Kunlun Advanced Manufacturing Technologies Equipment Co., Ltd. | 1 |
1 |
| ThyssenKrupp AG | 3332 |
1 |
| ThyssenKrupp Metalurgica Campo Limpo Ltda. | 19 |
1 |
| Other owners | 13 |