- All sections
- E - Fixed constructions
- E01B - Permanent waypermanent-way toolsmachines for making railways of all kinds
- E01B 3/30 - Hollow sleepers
Patent holdings for IPC class E01B 3/30
Total number of patents in this class: 9
10-year publication summary
|
1
|
1
|
0
|
0
|
1
|
0
|
2
|
2
|
1
|
0
|
| 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
Principal owners for this class
| Owner |
All patents
|
This class
|
|---|---|---|
| Braskem S.A. | 475 |
2 |
| Schwihag AG | 28 |
2 |
| Geotek, LLC | 13 |
1 |
| Korea Railroad Research Institute | 179 |
1 |
| Sigassure UK Limited | 1 |
1 |
| Inventio GmbH | 1 |
1 |
| Sateba France | 2 |
1 |
| Other owners | 0 |