- All sections
- E - Fixed constructions
- E01B - Permanent way; permanent-way tools; machines for making railways of all kinds
- E01B 3/44 - Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails made from other materials only if the material is essential
Patent holdings for IPC class E01B 3/44
Total number of patents in this class: 78
10-year publication summary
|
6
|
7
|
7
|
7
|
4
|
7
|
5
|
6
|
5
|
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 |
10 |
| Vossloh-Werke GmbH | 96 |
7 |
| Rutgers, The State University of New Jersey | 1776 |
6 |
| Encell Composites, LLC | 7 |
4 |
| Vossloh Fastening Systems GmbH | 14 |
4 |
| Sekisui Chemical Co., Ltd. | 3159 |
3 |
| Solidia Technologies, Inc. | 113 |
3 |
| Administrador de Infraestructuras Ferroviarias (adif) | 12 |
2 |
| Fundacion Cidaut | 27 |
2 |
| GREENRAIL S.r.l. | 4 |
2 |
| Lankhorst Engineered Products B.V. | 16 |
2 |
| Sener, Ingenieria y Sistemas, S.A. | 45 |
2 |
| Universidad Politecnica de Madrid | 296 |
2 |
| Greenrail Group S.r.l. | 2 |
2 |
| Railway Engineering Research Institute of China Academy of Railway Sciences Corporation Limited | 2 |
2 |
| China Academy of Railway Sciences Corporation Limited | 19 |
2 |
| General Electric Company | 18133 |
1 |
| Arkema France | 3790 |
1 |
| Carbonloc Pty Ltd | 1 |
1 |
| Compositech, LLC (a Louisiana Limited Liability company) | 2 |
1 |
| Other owners | 19 |