B61F 5/52
Bogie frames
B61F5/52 (Bogie frames) appears on 314 US grants and 229 published applications in this corpus.
Search patents in B61F- Granted patents
- 314
- Published applications
- 229
- Assignees
- 135
- Inventors
- 590
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 5 | 0 |
| 1978 | 6 | 0 |
| 1979 | 5 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 7 | 0 |
| 1983 | 2 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 11 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 6 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 6 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 6 | 1 |
| 2002 | 1 | 0 |
| 2003 | 5 | 4 |
| 2004 | 1 | 3 |
| 2005 | 0 | 1 |
| 2006 | 2 | 1 |
| 2007 | 0 | 1 |
| 2008 | 2 | 0 |
| 2009 | 0 | 2 |
| 2010 | 1 | 4 |
| 2011 | 3 | 1 |
| 2012 | 3 | 15 |
| 2013 | 4 | 4 |
| 2014 | 7 | 8 |
| 2015 | 5 | 20 |
| 2016 | 16 | 13 |
| 2017 | 12 | 14 |
| 2018 | 12 | 18 |
| 2019 | 16 | 38 |
| 2020 | 18 | 25 |
| 2021 | 25 | 17 |
| 2022 | 27 | 13 |
| 2023 | 22 | 8 |
| 2024 | 6 | 8 |
| 2025 | 7 | 5 |
| 2026 | 9 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Bogie frame for a railway vehicle25 Aug 2026US 12,715,485 B2Hitachi, Ltd.
- Maglev bogie with a centering function and guiding method thereof4 Aug 2026US 12,698,017 B2Jiangxi University of Science and Technology
- Pillow beam of rail vehicle and rail vehicle16 Jun 2026US 12,654,749 B2Hitachi, Ltd.
- Wheel arrangement for a rail vehicle2 Jun 2026US 12,643,580 B2Bombardier Transportation GmbH
- 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
- Undercarriage for a rail-bound maglev vehicle of a magnetic levitation train, and maglev vehicle13 Aug 2026US 2026/0233766 A1Max Boegl Stiftung & Co. KG
- Narrow vehicle body high-speed maglev train and suspension frame therefor6 Aug 2026US 2026/0225626 A1Crrc Qingdao Sifang Co., Ltd.
- 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.
- Side Beam of a Bogie Frame for a Railway Vehicle5 Feb 2026US 2026/0035022 A1Hitachi, Ltd.
Most cited
By later US patents
- Flexible railway car truck68US 4,938,152 ARailway Engineering Associates, Inc. · 1990
- Damping railway vehicle suspension63US 4,067,261 ASouth African Inventions Development Corporation · 1978
- Lightweight truck sideframe60US 5,481,986 AAMSTED Industries Incoporated · 1996
- Lightweight fatigue resistant railcar truck sideframe with tapering I-beam construction57US 5,410,968 AAMSTED Industries Incorporated · 1995
- Bogie with composite side members57US 6,338,300 B12002