- 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 39/20 - Tube expanders with mandrels, e.g. expandable
Patent holdings for IPC class B21D 39/20
Total number of patents in this class: 223
10-year publication summary
|
11
|
14
|
20
|
28
|
18
|
12
|
19
|
18
|
11
|
4
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2865 |
31 |
| JFE Steel Corporation | 6067 |
12 |
| Kobe Steel, Ltd. | 912 |
11 |
| Kyoshin Kogyo Co., Ltd. | 26 |
6 |
| Nippon Steel Corporation | 5649 |
6 |
| Uponor Innovation AB | 301 |
6 |
| Milwaukee Electric Tool Corporation | 3572 |
5 |
| Daikin Industries, Ltd. | 9495 |
4 |
| Showa Denko K.K. | 2539 |
4 |
| The Boeing Company | 19843 |
3 |
| Flowco Production Solutions, LLC | 69 |
3 |
| Guizhou Anda Aviation Forging Co., Ltd | 5 |
3 |
| Rothenberger AG | 116 |
3 |
| Sumitomo Metal Industries, Ltd. | 453 |
3 |
| UACJ Corporation | 631 |
3 |
| Valeo Systemes Thermiques | 2471 |
3 |
| Enventure Global Technology Inc. | 35 |
3 |
| Toyota Motor Corporation | 28582 |
2 |
| Airbus Operations S.A.S. | 2407 |
2 |
| GM Global Technology Operations LLC | 13620 |
2 |
| Other owners | 108 |