B61L 3/243
Using alternating current
Official title: {using alternating current}
B61L3/243 (Using alternating current) appears on 15 US grants and 10 published applications in this corpus.
Search patents in B61L- Granted patents
- 15
- Published applications
- 10
- Assignees
- 13
- Inventors
- 30
- Latest grant
- 5 Aug 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 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 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 2 |
| 2014 | 1 | 0 |
| 2015 | 2 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 2 | 1 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Sensor and method for detecting target molecules5 Aug 2025US 12,379,374 B2Southern Methodist University
- Linear induction motor excitation modulation based communication7 May 2024US 11,979,203 B2Rockwell Collins, Inc.
- Sensor and method for detecting target molecules23 Apr 2024US 11,965,878 B2Southern Methodist University
- System and method for detecting a break in a railway track28 Sep 2021US 11,130,509 B2Ricci Eletrônica Ltda
- System and method for detecting broken rail and occupied track from a railway vehicle20 Oct 2015US 9,162,691 B2Transportation Technology Center, Inc.
- Sensor and Method for Detecting Target Molecules23 Oct 2025US 2025/0327795 A1Southern Methodist University
- Sensor and Method for Detecting Target Molecules4 Jul 2024US 2024/0219377 A1Southern Methodist University
- Linear induction motor excitation modulation based communication17 Nov 2022US 2022/0368378 A1Rockwell Collins, Inc.
- Sensor and Method for Detecting Target Molecules19 Aug 2021US 2021/0255172 A1Southern Methodist University
- System and method for detecting a break in a railway track27 Jun 2019US 2019/0193762 A1Ricci Eletrônica Ltda
Most cited
By later US patents
- Train vehicle speed control apparatus23US 4,235,402 AWestinghouse Electric Corp. · 1980
- Railway track circuit23US 4,467,430 ACompagnie de Signaux et d'Entreprises Electriques · 1984
- Method for detecting the extent of clear, intact track near a railway vehicle21US 9,102,341 B2Transportation Technology Center, Inc. · 2015
- System and method for detecting broken rail and occupied track from a railway vehicle19US 9,162,691 B2Transportation Technology Center, Inc. · 2015
- Method for increasing the number of signals which may be transmitted from a ground station to a rail vehicle12US 4,720,067 A1988