B61F 5/304
Torsion-bar springs
Official title: {Torsion-bar springs}
B61F5/304 (Torsion-bar springs) appears on 4 US grants and 3 published applications in this corpus.
Search patents in B61F- Granted patents
- 4
- Published applications
- 3
- Assignees
- 6
- Inventors
- 20
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 1 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Bogie for a railway vehicle with roll stabiliser26 May 2026US 12,637,116 B2Cg Rail—Chinesisch-Deutsches Forschungs—Und Entwicklungszentrum FüR Bahn—Und Verkehrstechnik Dresden GmbH
- Bogie for a rail vehicle and rail vehicle carriage having at least one bogie, rail vehicle having at least one rail vehicle carriage, and method for adjusting the height of a carriage body of a rail vehicle carriage22 Jul 2025US 12,365,368 B2Stadler Rail AG
- Plate spring cover and railcar bogie including plate spring cover21 Aug 2018US 10,053,119 B2Kawasaki Jukogyo Kabushiki Kaisha
- Railway truck assembly24 Feb 1976US 3,939,779 AUnited States Steel Corporation
- Bogie for a railway vehicle with roll stabiliser1 Jun 2023US 2023/0166777 A1Cg Rail - Chinesisch-Deutsches Forschungs- Und Entwicklungszentrum FüR Bahn
- Bogie for a rail vehicle and rail vehicle carriage having at least one bogie, rail vehicle having a least one rail vehicle carriage, and method for adjusting the height of a carriage body of a rail vehicle carriage2 Jun 2022US 2022/0169291 A1Stadler Rail AG
- Plate spring cover and railcar bogie including plate spring cover1 Sep 2016US 2016/0251023 A1Kawasaki Jukogyo Kabushiki Kaisha
Most cited
By later US patents