- All sections
- E - Fixed constructions
- E01B - Permanent way; permanent-way tools; machines 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: 8
10-year publication summary
0
|
1
|
1
|
1
|
0
|
0
|
1
|
0
|
2
|
3
|
2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
Principal owners for this class
Owner |
All patents
|
This class
|
---|---|---|
Braskem S.A. | 441 |
2 |
Schwihag AG | 34 |
2 |
Geotek, LLC | 9 |
1 |
Korea Railroad Research Institute | 175 |
1 |
Sigassure UK Limited | 1 |
1 |
Inventio GmbH | 1 |
1 |
Other owners | 0 |