B61F 3/08
Without driven axles or wheels
Official title: without driven axles or wheels
B61F3/08 (Without driven axles or wheels) appears on 78 US grants and 34 published applications in this corpus.
Search patents in B61F- Granted patents
- 78
- Published applications
- 34
- Assignees
- 46
- Inventors
- 88
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 5 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 3 |
| 2013 | 1 | 0 |
| 2014 | 2 | 2 |
| 2015 | 0 | 3 |
| 2016 | 4 | 2 |
| 2017 | 0 | 4 |
| 2018 | 3 | 5 |
| 2019 | 5 | 5 |
| 2020 | 3 | 2 |
| 2021 | 6 | 2 |
| 2022 | 2 | 2 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Span bolster3 Mar 2026US 12,565,247 B2Kasgro Rail Corp.
- Rail wheel set and car14 Jan 2025US 12,195,057 B2LOSYCO GmbH
- Load sensing system for a railway truck assembly15 Nov 2022US 11,499,862 B2Amsted Rail Company, Inc.
- Rubbing plate of side bearer of railcar bogie and side bearer9 Aug 2022US 11,407,434 B2Kawasaki Railcar Manufacturing Co., Ltd.
- Vehicle guidance system26 Oct 2021US 11,155,281 B2Hyperloop Technologies, Inc.
- Multiple-axle rail car with span bolsters13 Mar 2025US 2025/0083712 A1Kasgro Rail Corp.
- Span bolster27 Jan 2022US 2022/0024499 A1Kasgro Rail Corp.
- Vehicle guidance system13 Jan 2022US 2022/0009531 A1Hyperloop Technologies, Inc.
- Rail wheel set and car2 Sep 2021US 2021/0269068 A1LOSYCO GmbH
- Railway vehicle8 Jul 2021US 2021/0206402 A1Transit X, LLC
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
- Damping railway vehicle suspension63US 4,067,261 ASouth African Inventions Development Corporation · 1978
- Railway truck54US 4,067,262 ASouth African Inventions Development Corporation · 1978
- High capacity integrated railway car truck52US 6,371,033 B1AMSTED Industries Incorporated · 2002