- All sections
- B - Performing operationstransporting
- B21D - Working or processing of sheet metal or metal tubes, rods or profiles without essentially removing materialpunching metal
- B21D 39/08 - Tube expanders
Patent holdings for IPC class B21D 39/08
Total number of patents in this class: 96
10-year publication summary
|
7
|
7
|
6
|
11
|
5
|
5
|
7
|
4
|
3
|
1
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | 2874 |
10 |
| Mitsubishi Heavy Industries, Ltd. | 8715 |
4 |
| Diversitech Corporation | 211 |
4 |
| Nippon Steel Corporation | 6238 |
4 |
| GM Global Technology Operations LLC | 15042 |
3 |
| OMS Machinery Co., Ltd. | 10 |
3 |
| Enventure Global Technology Inc. | 37 |
3 |
| Toyota Motor Corporation | 32116 |
2 |
| Enventure Global Technology, L.L.C. | 89 |
2 |
| Carrier Corporation | 4345 |
2 |
| Weatherford Technology Holdings, LLC | 2023 |
2 |
| First Co. | 25 |
2 |
| Kobe Steel, Ltd. | 872 |
2 |
| OP S.r.l. | 26 |
2 |
| Saudi Arabian Oil Company | 13155 |
2 |
| Valeo Systemes Thermiques | 2729 |
2 |
| Wuxi Sunyou General Machine Co., Ltd | 3 |
2 |
| The Boeing Company | 20043 |
1 |
| United Technologies Corporation | 2245 |
1 |
| Caterpillar Inc. | 9548 |
1 |
| Other owners | 42 |