B61L 23/22
Control, warning or like safety means along the route or between vehicles
Official title: for controlling traffic in two directions over the same pair of rails
B61L23/22 (Control, warning or like safety means along the route or between vehicles) appears on 50 US grants and 55 published applications in this corpus.
Search patents in B61L- Granted patents
- 50
- Published applications
- 55
- Assignees
- 40
- Inventors
- 137
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 2 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 0 | 3 |
| 2014 | 1 | 4 |
| 2015 | 4 | 4 |
| 2016 | 7 | 3 |
| 2017 | 3 | 3 |
| 2018 | 1 | 8 |
| 2019 | 4 | 1 |
| 2020 | 3 | 3 |
| 2021 | 4 | 3 |
| 2022 | 3 | 5 |
| 2023 | 0 | 1 |
| 2024 | 3 | 2 |
| 2025 | 3 | 5 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Collision protection and safety system for rail vehicles31 Mar 2026US 12,589,785 B2Harsco Technologies LLC
- Trackside device, track star chain system and train operation control system20 Jan 2026US 12,528,528 B2Traffic Control Technology Co., Ltd
- Train autonomous control system and method based on train-to-train communication5 Aug 2025US 12,377,893 B2Casco Signal Ltd.
- Route control program generation device, route control program generation method and program11 Feb 2025US 12,221,141 B2Mitsubishi Heavy Industries, Ltd.
- System and method for controlling movers in an independent cart system during heavy traffic14 Jan 2025US 12,195,062 B2Rockwell Automation Technologies, Inc.
- A control method for a control system of a railway transport facility and said control system of a railway transport facility9 Jul 2026US 2026/0192835 A1Hitachi Rail Sts S.P.A.
- System and method for protecting a railroad grade crossing or railroad track section1 Jan 2026US 2026/0001580 A1Siemens Mobility GmbH
- Train equal-interval adjustment method, medium and electronic device11 Sep 2025US 2025/0285051 A1BYD Company Limited
- Railroad crossing blockage detection and notification system10 Apr 2025US 2025/0115283 A1
- Infrastructure system emergency management10 Apr 2025US 2025/0119721 A1
Most cited
By later US patents
- Lifting restrictive signaling in a block51US 6,853,888 B2Quantum Engineering, Inc. · 2005
- Railway vehicle detection44US 8,157,218 B2Westinghouse Brake and Signal Holdings Limited · 2012
- Tram coordinating method and apparatus40US 5,676,059 A1997
- Wayside oriented moving block38US 4,166,599 AGeneral Signal Corporation · 1979
- Lifting restrictive signaling in a block35US 7,092,800 B2Quantum Engineering, Inc. · 2006