B61F 5/04
Bolster supports or mountings
Official title: Bolster supports or mountings (side bearings B61F5/14)
B61F5/04 (Bolster supports or mountings) appears on 366 US grants and 265 published applications in this corpus.
Search patents in B61F- Granted patents
- 366
- Published applications
- 265
- Assignees
- 148
- Inventors
- 574
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 5 | 0 |
| 1978 | 12 | 0 |
| 1979 | 7 | 0 |
| 1980 | 9 | 0 |
| 1981 | 13 | 0 |
| 1982 | 10 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 6 | 0 |
| 1991 | 7 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 0 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 1 | 0 |
| 2001 | 7 | 2 |
| 2002 | 4 | 4 |
| 2003 | 2 | 4 |
| 2004 | 5 | 4 |
| 2005 | 3 | 4 |
| 2006 | 2 | 5 |
| 2007 | 4 | 6 |
| 2008 | 3 | 7 |
| 2009 | 6 | 6 |
| 2010 | 5 | 6 |
| 2011 | 4 | 9 |
| 2012 | 7 | 5 |
| 2013 | 5 | 11 |
| 2014 | 10 | 17 |
| 2015 | 11 | 16 |
| 2016 | 14 | 19 |
| 2017 | 17 | 20 |
| 2018 | 17 | 25 |
| 2019 | 20 | 30 |
| 2020 | 22 | 20 |
| 2021 | 21 | 16 |
| 2022 | 16 | 9 |
| 2023 | 8 | 5 |
| 2024 | 5 | 9 |
| 2025 | 7 | 3 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Railroad car truck damper wedge fittings4 Aug 2026US 12,698,016 B2National Steel Car Limited
- System for recovery of compressed air released by air suspensions of at least one railway vehicle or train31 Mar 2026US 12,589,780 B2FAIVELEY TRANSPORT ITALIA S. p. A.
- Tilting system and tilting control method for railway vehicle and railway vehicle25 Nov 2025US 12,479,480 B2Crrc Qingdao Sifang Co., Ltd.
- Railroad car truck side frame21 Oct 2025US 12,448,014 B2Transportation IP Holdings, LLC
- Railroad vehicle24 Jun 2025US 12,337,880 B2Hitachi, Ltd.
- Narrow vehicle body high-speed maglev train and suspension frame therefor6 Aug 2026US 2026/0225626 A1Crrc Qingdao Sifang Co., Ltd.
- Bogie assemblies19 Mar 2026US 2026/0077790 A1Amsted Rail Company, Inc.
- Rail Vehicle with Pneumatic Suspension1 Jan 2026US 2026/0001576 A1Siemens Mobility Austria GmbH
- Rail Car29 May 2025US 2025/0171058 A1Hitachi, Ltd.
- Bogie assembly8 May 2025US 2025/0145187 A1Transportation IP Holdings, LLC
Most cited
By later US patents
- Bogie vehicle with electrohydraulic brakes and hydropneumatic suspension103US 5,074,624 ACompagnie Industrielle de Materiel de Transport · 1991
- Railway truck damping assembly70US 4,915,031 AHansen Inc. · 1990
- Damped railway car suspension64US 4,356,775 A1982
- Dual face friction wedge61US 5,511,489 AStandard Car Truck Company · 1996
- Rail road freight car with damped suspension60US 6,895,866 B2National Steel Car Limited · 2005