B61L 23/163
Using direct current
Official title: {using direct current}
B61L23/163 (Using direct current) appears on 5 US grants and 4 published applications in this corpus.
Search patents in B61L- Granted patents
- 5
- Published applications
- 4
- Assignees
- 4
- Inventors
- 13
- Latest grant
- 18 Jul 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 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 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for determining a status of a track section of a railroad; associated apparatus and non-transitory computer readable medium18 Jul 2023US 11,702,119 B2Alstom Transport Technologies
- Method for managing a railway electrical circuit24 Dec 2019US 10,513,277 B2Alstom Transport Technologies
- Fixed block track circuit4 Apr 2017US 9,610,958 B2China Engineering Consultants, Inc.
- Railway code generation and signaling system and method12 Jul 2016US 9,391,820 B2Alstom Transport Technologies
- Signal control system25 Jan 1983US 4,369,942 ASafetran Systems Corporation
- Method for determining a status of a track section of a railroad; associated apparatus and non-transitory computer readable medium10 Nov 2022US 2022/0355841 A1Alstom Transport Technologies
- Method for managing a railway electrical circuit16 Nov 2017US 2017/0327137 A1Alstom Transport Technologies
- Fixed block track circuit29 Dec 2016US 2016/0375917 A1China Engineering Consultants, Inc.
- Railway code generation and signaling system and method1 May 2014US 2014/0119414 A1General Electric Company
Most cited
By later US patents