- All sections
- B - Performing operationstransporting
- B21D - Working or processing of sheet metal or metal tubes, rods or profiles without essentially removing materialpunching metal
- B21D 51/44 - Making closures, e.g. caps
Patent holdings for IPC class B21D 51/44
Total number of patents in this class: 219
10-year publication summary
|
15
|
21
|
14
|
22
|
20
|
14
|
8
|
12
|
11
|
4
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Stolle Machinery Company, LLC | 432 |
29 |
| Crown Packaging Technology, Inc. | 497 |
22 |
| Soudronic AG | 70 |
16 |
| Ball Corporation | 386 |
10 |
| Toyo Seikan Co., Ltd. | 594 |
7 |
| Alfons Haar, Inc. | 13 |
5 |
| Container Development, Ltd. | 9 |
5 |
| Nippon Light Metal Company, Ltd. | 666 |
5 |
| Soode Nagano Co., Ltd. | 20 |
5 |
| Toyo Seikan Group Holdings, Ltd. | 841 |
5 |
| Daiwa Can Company | 237 |
4 |
| Rexam Beverage Can Company | 70 |
4 |
| Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | 561 |
4 |
| Suzhou Hycan Holdings Co., Ltd. | 29 |
4 |
| Guala Closures S.p.A. | 169 |
3 |
| Hfa, Inc. | 50 |
3 |
| Saeta GmbH & Co. KG | 41 |
3 |
| Suzhou Slac Precision Equipment Co., Ltd. | 29 |
3 |
| World Bottling Cap, LLC | 21 |
3 |
| Constellium Rolled Products SINGEN GmbH& Co KG | 18 |
3 |
| Other owners | 76 |