- All sections
- B - Performing operationstransporting
- B21C - Manufacture of metal sheets, wire, rods, tubes, profiles or like semi-manufactured products otherwise than by rollingauxiliary operations used in connection with metal-working without essentially removing material
- B21C 37/12 - Making tubes or metal hoses with helically arranged seams
Patent holdings for IPC class B21C 37/12
Total number of patents in this class: 166
10-year publication summary
|
14
|
8
|
20
|
17
|
14
|
11
|
11
|
9
|
9
|
3
|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Keystone Tower Systems, Inc. | 47 |
27 |
| ITI Scotland Limited | 151 |
10 |
| Baker Hughes Energy Technology UK Limited | 211 |
8 |
| Bartell Machinery Systems, LLC | 39 |
4 |
| Jinwoong Technology Co., Ltd. | 10 |
4 |
| National Oilwell Varco Denmark I/S | 131 |
4 |
| Kanthal AB | 110 |
4 |
| Shell Internationale Research Maatschappij B.V. | 3548 |
3 |
| GE Oil & Gas UK Limited | 160 |
3 |
| Pacific Roller Die Company, Inc. | 4 |
3 |
| Salzgitter Mannesmann Grossrohr GmbH | 4 |
3 |
| Technip France | 706 |
3 |
| Witzenmann GmbH | 66 |
3 |
| Zeffiro SRL | 5 |
3 |
| Odfjell Oceanwind AS | 10 |
3 |
| Nanjing Dade Steel Pipe Co., Ltd. | 6 |
3 |
| BOA Balg- und Kompensatoren-Technologie GmbH | 11 |
2 |
| Contech Engineered Solutions LLC | 278 |
2 |
| Formtek, Inc. | 43 |
2 |
| Proportional Technologies, Inc. | 12 |
2 |
| Other owners | 70 |