B61L 27/33
Backup systems
Official title: Backup systems, e.g. switching when failures occur
B61L27/33 (Backup systems) appears on 33 US grants and 44 published applications in this corpus.
Search patents in B61L- Granted patents
- 33
- Published applications
- 44
- Assignees
- 25
- Inventors
- 126
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 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 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 2 |
| 2015 | 2 | 3 |
| 2016 | 0 | 1 |
| 2017 | 1 | 0 |
| 2018 | 2 | 5 |
| 2019 | 5 | 8 |
| 2020 | 4 | 3 |
| 2021 | 3 | 2 |
| 2022 | 0 | 4 |
| 2023 | 2 | 4 |
| 2024 | 2 | 4 |
| 2025 | 9 | 3 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Apparatus and method for controlling a railway system7 Oct 2025US 12,434,749 B2Hitachi Rail Sts S.P.A.
- Method and system for virtually coupled train set control2 Sep 2025US 12,403,945 B2Beijing Jiaotong University
- Safety information supervising apparatus applied to high-speed rail signaling system13 May 2025US 12,296,877 B2Casco Signal Ltd.
- Remote rail monitoring system and/or method15 Apr 2025US 12,275,444 B2Parallel Systems, Inc.
- Wireless vehicle management system2 Jul 2026US 2026/0184355 A1Arup Ventures Limited
- Cbtc system based on interval protection and heterogeneous redundancy, and implementation method thereof7 May 2026US 2026/0125089 A1Casco Signal Ltd.
- Wireless vehicle management system10 Jul 2025US 2025/0222964 A1Arup Ventures Limited
- Remote rail monitoring system and/or method3 Jul 2025US 2025/0214635 A1Parallel Systems, Inc.
- Remote rail monitoring system and/or method23 Jan 2025US 2025/0026388 A1Parallel Systems, Inc.
Most cited
By later US patents
- Transit vehicle handback control apparatus and method22US 4,327,415 AWestinghouse Electric Corp. · 1982
- Data transmission system, and method of transmitting data from a central station to a track-bound vehicle10US 7,433,766 B2Siemens Aktiengesellschaft · 2008
- Control system for vehicle in a guideway network8US 9,128,815 B2Thales Canada Inc. · 2015
- Transfer of vehicle control system and method7US 10,279,825 B2General Electric Company · 2019
- Wireless train management system3US 10,518,790 B2Arup Ventures Limited · 2019