B61L 3/18
Using electric current passing between devices along the route and devices on
Official title: using electric current passing between devices along the route and devices on the vehicle or train
B61L3/18 (Using electric current passing between devices along the route and devices on) appears on 38 US grants and 19 published applications in this corpus.
Search patents in B61L- Granted patents
- 38
- Published applications
- 19
- Assignees
- 23
- Inventors
- 86
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 0 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 3 |
| 2013 | 2 | 0 |
| 2014 | 2 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 3 |
| 2017 | 5 | 4 |
| 2018 | 1 | 2 |
| 2019 | 2 | 2 |
| 2020 | 1 | 1 |
| 2021 | 0 | 1 |
| 2022 | 2 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 2 | 0 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Method and system for estimating temperature-related forces in railway lines11 Nov 2025US 12,466,451 B2KB Signaling Inc.
- Monitoring system for monitoring a condition of an electric rail system and/or of a current collector of the rail system8 Apr 2025US 12,269,519 B2Aktiebolaget Skf
- System for communicating vehicle information2 Apr 2024US 11,945,482 B2Westinghouse Air Brake Technologies Corporation
- Rail breakage detection device and rail breakage detection system10 May 2022US 11,325,623 B2Mitsubishi Electric Corporation
- Charging system for electric vehicles25 Jan 2022US 11,230,309 B2Transtech of South Carolina
- Method and system for estimating temperature-related forces in railway lines30 Mar 2023US 2023/0094944 A1Alstom Transport Technologies
- System for communicating vehicle information21 Oct 2021US 2021/0323592 A1Westinghouse Air Brake Technologies Corporation
- Monitoring system for monitoring a condition of an electric rail system and/or of a current collector of the rail system9 Jan 2020US 2020/0010100 A1Aktiebolaget Skf
- Charging system for electric vehicles26 Dec 2019US 2019/0389497 A1Transtech of South Carolina
- Rail breakage detection device and rail breakage detection system21 Nov 2019US 2019/0351923 A1Mitsubishi Electric Corporation
Most cited
By later US patents
- Communication system and method for a rail vehicle consist234US 8,825,239 B2General Electric Company · 2014
- Regenerative braking protection for an electrically-propelled traction vehicle29US 5,331,261 AGeneral Electric Company · 1994
- Dual contacts on voltage rail19US 4,892,980 AJ. N. Fauver Company, Inc. · 1990
- Communication method in movable body operating system17US 5,886,619 AKabushiki Kaisha Toyoda Jidoshokki Seisakusho · 1999
- Route examining system and method16US 9,834,237 B2General Electric Company · 2017