- All sections
- B - Performing operations; transporting
- B21F - Working or processing of metal wire
- B21F 35/02 - Bending or deforming ends of coil springs to special shape
Patent holdings for IPC class B21F 35/02
Total number of patents in this class: 29
10-year publication summary
|
3
|
5
|
4
|
2
|
1
|
3
|
0
|
1
|
0
|
0
|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Mitsubishi Steel Mfg. Co., Ltd. | 137 |
4 |
| NHK Spring Co., Ltd. | 1657 |
3 |
| Chuo Hatsujo Kabushiki Kaisha | 124 |
2 |
| BAL Seal Engineering, LLC | 106 |
2 |
| Covidien LP | 10647 |
1 |
| Baumann Federn AG | 10 |
1 |
| David Trickett | 2 |
1 |
| Meritor Suspension Systems Company, US | 2 |
1 |
| Nivarox-FAR S.A. | 265 |
1 |
| Orii & MEC Corporation | 5 |
1 |
| Paul Rodgers | 10 |
1 |
| Plusprings Machinery Co.,Ltd | 5 |
1 |
| SCHERDEL INNOTEC Forschungs-und Entwicklungs-GmbH | 28 |
1 |
| Shinko Machinery Co., Ltd. | 6 |
1 |
| Spuhl AG | 12 |
1 |
| Suncall Corporation | 166 |
1 |
| Gestarsic, S.L. | 2 |
1 |
| Remex AG | 3 |
1 |
| Tech Corporation | 1 |
1 |
| Daewon Kang Up Co., Ltd. | 21 |
1 |
| Other owners | 2 |