B61L 23/166
Using alternating current
Official title: {using alternating current}
B61L23/166 (Using alternating current) appears on 16 US grants and 4 published applications in this corpus.
Search patents in B61L- Granted patents
- 16
- Published applications
- 4
- Assignees
- 15
- Inventors
- 33
- Latest grant
- 24 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 2 |
| 2020 | 0 | 0 |
| 2021 | 2 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Device, system and method for monitoring conditions on a railway track24 Jun 2025US 12,337,882 B2Hisway Labs (Pty) Ltd
- System and method for detecting a break in a railway track28 Sep 2021US 11,130,509 B2Ricci Eletrônica Ltda
- System and method for controlling signaling devices along railroad tracks in electrified territory31 Aug 2021US 11,104,362 B2Siemens Mobility GmbH
- Method for detecting the extent of clear, intact track near a railway vehicle11 Aug 2015US 9,102,341 B2Transportation Technology Center, Inc.
- Railway track circuits28 Nov 1995US 5,470,034 AWestinghouse Brake & Signal Holding Ltd.
- Device, system and method for monitoring conditions on a railway track14 Apr 2022US 2022/0111878 A1Hisway Labs (Pty) Ltd
- System and method for controlling signaling devices along railroad tracks in electrified territory1 Aug 2019US 2019/0232989 A1Siemens Inudstry, Inc.
- System and method for detecting a break in a railway track27 Jun 2019US 2019/0193762 A1Ricci Eletrônica Ltda
- Method for detecting the extent of clear, intact track near a railway vehicle19 Dec 2013US 2013/0334373 A1Transportation Technology Center, Inc.
Most cited
By later US patents
- Railway track circuit23US 4,467,430 ACompagnie de Signaux et d'Entreprises Electriques · 1984
- Track signalling system22US 4,074,879 AGeneral Signal Corporation · 1978
- Method for detecting the extent of clear, intact track near a railway vehicle21US 9,102,341 B2Transportation Technology Center, Inc. · 2015
- Railway track circuits16US 5,470,034 AWestinghouse Brake & Signal Holding Ltd. · 1995
- Railway track circuits13US 5,330,135 AWestinghouse Brake and Signal Holdings Limited · 1994