B61F 3/02
Types of bogies: with more than one axle
Official title: with more than one axle
B61F3/02 (Types of bogies: with more than one axle) appears on 297 US grants and 215 published applications in this corpus.
Search patents in B61F- Granted patents
- 297
- Published applications
- 215
- Assignees
- 129
- Inventors
- 469
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 9 | 0 |
| 1978 | 11 | 0 |
| 1979 | 7 | 0 |
| 1980 | 6 | 0 |
| 1981 | 7 | 0 |
| 1982 | 7 | 0 |
| 1983 | 4 | 0 |
| 1984 | 9 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 7 | 0 |
| 1989 | 6 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 2 |
| 2003 | 3 | 3 |
| 2004 | 1 | 1 |
| 2005 | 2 | 2 |
| 2006 | 2 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 2 | 8 |
| 2010 | 1 | 14 |
| 2011 | 1 | 6 |
| 2012 | 7 | 10 |
| 2013 | 13 | 8 |
| 2014 | 13 | 14 |
| 2015 | 8 | 9 |
| 2016 | 13 | 14 |
| 2017 | 6 | 13 |
| 2018 | 14 | 18 |
| 2019 | 13 | 19 |
| 2020 | 10 | 19 |
| 2021 | 19 | 18 |
| 2022 | 22 | 14 |
| 2023 | 14 | 6 |
| 2024 | 8 | 5 |
| 2025 | 5 | 5 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Bogie and vehicle28 Apr 2026US 12,612,085 B2Mitsubishi Heavy Industries, Ltd.
- Chassis for a rail vehicle10 Mar 2026US 12,570,332 B2Siemens Mobility Austria GmbH
- Span bolster3 Mar 2026US 12,565,247 B2Kasgro Rail Corp.
- 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
- Rail road car truck bolster22 Jul 2025US 12,365,369 B2National Steel Car Limited
- Rail Vehicle and Running Gear for the Rail Vehicle28 May 2026US 2026/0145713 A1Siemens Mobility Austria GmbH
- Bogie assemblies19 Mar 2026US 2026/0077790 A1Amsted Rail Company, Inc.
- Rail road car truck bolster13 Nov 2025US 2025/0346263 A1National Steel Car Limited
- Electric rail vehicle28 Aug 2025US 2025/0269882 A1Parallel Systems, Inc.
- Air-Outlet-Hood for Self-Ventilated Traction Motors for Rolling Stock22 May 2025US 2025/0167622 A1ALSTOM Holdings
Most cited
By later US patents
- Flexible railway car truck68US 4,938,152 ARailway Engineering Associates, Inc. · 1990
- Radial axle railway truck64US 4,134,343 AGeneral Steel Industries, Inc. · 1979
- Damped railway car suspension64US 4,356,775 A1982
- Damping railway vehicle suspension63US 4,067,261 ASouth African Inventions Development Corporation · 1978
- Railway truck54US 4,067,262 ASouth African Inventions Development Corporation · 1978