- 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 51/44 - Making closures, e.g. caps
Patent holdings for IPC class B21D 51/44
Total number of patents in this class: 228
10-year publication summary
23
|
15
|
25
|
14
|
27
|
22
|
15
|
7
|
12
|
4
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Stolle Machinery Company, LLC | 367 |
30 |
Crown Packaging Technology, Inc. | 494 |
24 |
Soudronic AG | 74 |
16 |
Ball Corporation | 390 |
15 |
Toyo Seikan Co., Ltd. | 515 |
7 |
Rexam Beverage Can Company | 94 |
6 |
Alfons Haar, Inc. | 10 |
5 |
Container Development, Ltd. | 9 |
5 |
Nippon Light Metal Company, Ltd. | 645 |
5 |
Soode Nagano Co., Ltd. | 12 |
5 |
Daiwa Can Company | 213 |
4 |
Sacmi Cooperativa Meccanici Imola Societa' Cooperativa | 529 |
4 |
Toyo Seikan Group Holdings, Ltd. | 765 |
4 |
World Bottling Cap, LLC | 23 |
4 |
Hfa, Inc. | 47 |
3 |
JFE Steel Corporation | 6067 |
3 |
Saeta GmbH & Co. KG | 40 |
3 |
Suzhou Slac Precision Equipment Co., Ltd. | 28 |
3 |
CROWN Packaging UK PLC | 35 |
3 |
Constellium Rolled Products SINGEN GmbH& Co KG | 19 |
3 |
Other owners | 76 |