- All sections
- B - Performing operationstransporting
- B21K - Making forged or pressed metal products, e.g. horse-shoes, rivets, bolts or wheels
- B21K 21/06 - Shaping thick-walled hollow articles, e.g. projectiles
Patent holdings for IPC class B21K 21/06
Total number of patents in this class: 31
10-year publication summary
|
3
|
2
|
3
|
2
|
2
|
1
|
0
|
2
|
0
|
2
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Hitachi Metals, Ltd. | 1957 |
4 |
| Hitachi Metals MMC Superalloy, Ltd. | 11 |
3 |
| Penn United Technologies, Inc. | 36 |
2 |
| Nippon Institute of Technology | 4 |
2 |
| VITKOVICE CYLINDERS a.s. | 3 |
2 |
| Neuman Aluminium Fliesspresswerk GmbH | 2 |
2 |
| Robert Bosch GmbH | 43063 |
1 |
| NTN Corporation | 4969 |
1 |
| Showa Denko K.K. | 2177 |
1 |
| NSK Ltd. | 2810 |
1 |
| Bofors Defence AB | 1 |
1 |
| Federal Cartridge Company | 563 |
1 |
| Kanemitsu Corporation | 10 |
1 |
| Newfrey LLC | 544 |
1 |
| Siempelkamp Maschinen- und Anlagenbau GmbH & Co. KG | 126 |
1 |
| Textron Innovations Inc. | 2363 |
1 |
| UACJ Corporation | 707 |
1 |
| TOYOTA JIDOSHA KABUSHIKI KAISHA (also trading as TOYOTA MOTOR CORPORATION) | 12671 |
1 |
| No.59 Research Institute of China Ordnance Industry | 4 |
1 |
| Douglas Burke | 1 |
1 |
| Other owners | 2 |