- All sections
- B - Performing operationstransporting
- B21K - Making forged or pressed metal products, e.g. horse-shoes, rivets, bolts or wheels
- B21K 21/14 - Shaping end portions of hollow articles closed or substantially-closed ends, e.g. cartridge bottoms
Patent holdings for IPC class B21K 21/14
Total number of patents in this class: 22
10-year publication summary
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1
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3
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2
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1
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1
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1
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2
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1
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2
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1
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| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| American Axle & Manufacturing, Inc. | 637 |
3 |
| Concurrent Technologies Corporation | 51 |
3 |
| NHK Spring Co., Ltd. | 1950 |
3 |
| RUAG Ammotec AG | 47 |
3 |
| VITKOVICE CYLINDERS a.s. | 3 |
2 |
| Robert Bosch GmbH | 43788 |
1 |
| Showa Denko K.K. | 2090 |
1 |
| ArvinMeritor Technology, LLC | 411 |
1 |
| RUAG Ammotec GmbH | 46 |
1 |
| ThyssenKrupp AG | 3475 |
1 |
| ThyssenKrupp Federn und Stabilisatoren GmbH | 51 |
1 |
| Hydro Extruded Solutions AS | 52 |
1 |
| Gatling Ammunition LLC | 1 |
1 |
| Other owners | 0 |