B61F 15/20
Details
B61F15/20 (Details) appears on 119 US grants and 117 published applications in this corpus.
Search patents in B61F- Granted patents
- 119
- Published applications
- 117
- Assignees
- 62
- Inventors
- 251
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 4 | 2 |
| 2004 | 2 | 1 |
| 2005 | 0 | 3 |
| 2006 | 1 | 5 |
| 2007 | 2 | 1 |
| 2008 | 1 | 2 |
| 2009 | 1 | 5 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 3 | 5 |
| 2013 | 3 | 6 |
| 2014 | 7 | 6 |
| 2015 | 6 | 4 |
| 2016 | 7 | 12 |
| 2017 | 6 | 8 |
| 2018 | 4 | 11 |
| 2019 | 11 | 17 |
| 2020 | 14 | 5 |
| 2021 | 10 | 7 |
| 2022 | 4 | 4 |
| 2023 | 3 | 4 |
| 2024 | 5 | 2 |
| 2025 | 4 | 5 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Backing ring assembly for railway axles10 Feb 2026US 12,545,301 B2Aktiebolaget Skf
- Rubber bushing for railroad trucks28 Oct 2025US 12,454,292 B2Sumitomo Riko Company Limited
- Railway axle5 Aug 2025US 12,377,888 B2Nippon Steel Corporation
- Universal backing ring25 Mar 2025US 12,258,052 B2A. Stucki Company
- Ultralight two-track train that does not derail4 Mar 2025US 12,240,504 B2
- Rail conveyor systems18 Sep 2025US 2025/0289480 A1FLSmidth A/S
- Universal backing ring19 Jun 2025US 2025/0196898 A1A. Stucki Company
- Method for determining anomalies associated with a railcar wheelset, or a railcar bogie assembly that the railcar wheelset is part of, or a track using an axle-mounted sensor cuff assembly8 May 2025US 2025/0145188 A1Nvh Technology LLC
- Device for monitoring rail bogie and associated rail bogie6 Mar 2025US 2025/0074484 A1
- Equipment Mountable Bearing Adapters and Techniques for use to Retrofit Railcars30 Jan 2025US 2025/0033678 A1Intramotev Inc.
Most cited
By later US patents
- Bearing with sensor module88US 6,161,962 AThe Timken Company · 2000
- Bearing seal with oil deflectors45US 5,511,886 ABrenco, Incorporated · 1996
- Hydrodynamic seal44US 4,770,548 AThe Timken Company · 1988
- Method and device for monitoring status of mechanical equipment and abnormality diagnosing device44US 7,184,930 B2Nsk Ltd. · 2007
- Compact seal41US 4,799,808 AThe Timken Company · 1989