E01B 3/22
Longitudinal sleepers
Official title: Longitudinal sleepers; Longitudinal sleepers integral or combined with tie-rods; Combined longitudinal and transverse sleepers
E01B3/22 (Longitudinal sleepers) appears on 5 US grants and 5 published applications in this corpus.
Search patents in E01B- Granted patents
- 5
- Published applications
- 5
- Assignees
- 2
- Inventors
- 4
- Latest grant
- 8 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 3 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year.
Recent patents
- Light Railway System6 Oct 2022US 2022/0316143 A1Carpet Track Ltd
- Train Rail Track Structure Systems30 Jun 2016US 2016/0186384 A1
- Modular railroad track assembly24 Mar 2016US 2016/0083910 A1
- Train Rail Track Structure Systems23 Oct 2014US 2014/0312133 A1
- Supporting arrangement2 Feb 2012US 2012/0024970 A1Petrucco, S.A.
Most cited
By later US patents