B61H 9/04
Brakes characterised by, or modified for, their application to special railway systems
Official title: for preventing or controlling movement in one direction or, selectively, in either direction
B61H9/04 (Brakes characterised by, or modified for, their application to special railway systems) appears on 6 US grants and 8 published applications in this corpus.
Search patents in B61H- Granted patents
- 6
- Published applications
- 8
- Assignees
- 6
- Inventors
- 34
- Latest grant
- 13 May 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 2 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 2 | 0 |
| 2025 | 1 | 0 |
By publication year.
Recent patents
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- Tractive Vehicle and Vehicle Combination and Method for Operating a Tractive Vehicle and Vehicle Combination2 Sep 2021US 2021/0269070 A1Bombardier Transportation GmbH
- Main circuit of traction system and control method therefor and rail vehicle22 Apr 2021US 2021/0114466 A1Zhuzhou Crrc Times Electric Co., Ltd.
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Most cited
By later US patents