- All sections
- B - Performing operationstransporting
- B21K - Making forged or pressed metal products, e.g. horse-shoes, rivets, bolts or wheels
- B21K 1/22 - Making machine elements valve parts poppet valves, e.g. for internal-combustion engines
Patent holdings for IPC class B21K 1/22
Total number of patents in this class: 75
10-year publication summary
|
5
|
6
|
4
|
5
|
10
|
8
|
4
|
2
|
1
|
0
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Federal-Mogul Valvetrain GmbH | 63 |
17 |
| NITTAN Corporation | 52 |
14 |
| Fuji Oozx Inc. | 23 |
9 |
| Nittan Valve Co., Ltd. | 134 |
5 |
| Eaton Intelligent Power Limited | 6316 |
4 |
| Honda Motor Co., Ltd. | 24908 |
2 |
| Mitsubishi Heavy Industries, Ltd. | 8550 |
2 |
| Caterpillar Inc. | 9208 |
2 |
| MAN Diesel & Turbo, Filial af MAN Diesel & Turbo SE, Tyskland | 39 |
2 |
| Yoshimura Company | 10 |
2 |
| Robert Bosch GmbH | 41843 |
1 |
| Daimler AG | 3416 |
1 |
| Continental Automotive GmbH | 5540 |
1 |
| Donnelly Corporation | 48 |
1 |
| Fuji Hollow Valve Inc. | 2 |
1 |
| JC Carter LLC | 2 |
1 |
| Kennametal India Limited | 30 |
1 |
| Magneti Marelli Powertrain S.p.A. | 31 |
1 |
| MAHLE International GmbH | 2701 |
1 |
| Markisches Werk GmbH | 13 |
1 |
| Other owners | 6 |