- 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 39/08 - Tube expanders
Patent holdings for IPC class B21D 39/08
Total number of patents in this class: 100
10-year publication summary
4
|
7
|
7
|
6
|
11
|
5
|
5
|
7
|
4
|
1
|
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 |
10 |
Nippon Steel Corporation | 5649 |
5 |
Mitsubishi Heavy Industries, Ltd. | 8217 |
4 |
Diversitech Corporation | 200 |
4 |
GM Global Technology Operations LLC | 13620 |
3 |
Enventure Global Technology Inc. | 35 |
3 |
Toyota Motor Corporation | 28582 |
2 |
Shell Canada Limited | 139 |
2 |
Enventure Global Technology, L.L.C. | 113 |
2 |
Carrier Corporation | 4759 |
2 |
Weatherford Technology Holdings, LLC | 2135 |
2 |
First Co. | 25 |
2 |
Kobe Steel, Ltd. | 912 |
2 |
Saudi Arabian Oil Company | 11322 |
2 |
Valeo Systemes Thermiques | 2471 |
2 |
OMS Machinery Co., Ltd. | 8 |
2 |
Wuxi Sunyou General Machine Co., Ltd | 3 |
2 |
The Boeing Company | 19843 |
1 |
United Technologies Corporation | 2328 |
1 |
Caterpillar Inc. | 8877 |
1 |
Other owners | 46 |