B61L 23/00
Control, warning or like safety means along the route or between vehicles
Official title: Control, warning or like safety means along the route or between vehicles or trains
B61L23/00 (Control, warning or like safety means along the route or between vehicles) appears on 1,447 US grants and 1,668 published applications in this corpus.
Search patents in B61L- Granted patents
- 1,447
- Published applications
- 1,668
- Assignees
- 601
- Inventors
- 3,075
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 7 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 9 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 6 | 0 |
| 1988 | 15 | 0 |
| 1989 | 5 | 0 |
| 1990 | 12 | 0 |
| 1991 | 7 | 0 |
| 1992 | 8 | 0 |
| 1993 | 4 | 0 |
| 1994 | 7 | 0 |
| 1995 | 9 | 0 |
| 1996 | 6 | 0 |
| 1997 | 11 | 0 |
| 1998 | 14 | 0 |
| 1999 | 14 | 0 |
| 2000 | 15 | 0 |
| 2001 | 18 | 7 |
| 2002 | 14 | 13 |
| 2003 | 16 | 6 |
| 2004 | 9 | 22 |
| 2005 | 6 | 21 |
| 2006 | 11 | 19 |
| 2007 | 16 | 16 |
| 2008 | 12 | 8 |
| 2009 | 8 | 18 |
| 2010 | 17 | 26 |
| 2011 | 11 | 23 |
| 2012 | 15 | 34 |
| 2013 | 17 | 37 |
| 2014 | 35 | 67 |
| 2015 | 43 | 66 |
| 2016 | 50 | 95 |
| 2017 | 81 | 93 |
| 2018 | 64 | 123 |
| 2019 | 107 | 130 |
| 2020 | 108 | 144 |
| 2021 | 105 | 135 |
| 2022 | 98 | 110 |
| 2023 | 90 | 143 |
| 2024 | 115 | 124 |
| 2025 | 119 | 115 |
| 2026 | 81 | 73 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B61L 23/04Control, warning or like safety means along the route or between vehicles835
- B61L 23/34Control, warning or like safety means along the route or between vehicles196
- B61L 23/08Control, warning or like safety means along the route or between vehicles179
- B61L 23/002Control or safety means for heart-points and crossings of aerial railways, funicular119
- B61L 23/06Control, warning or like safety means along the route or between vehicles108
- B61L 23/22Control, warning or like safety means along the route or between vehicles50
- B61L 23/007Safety arrangements on railway crossings29
- B61L 23/02Control, warning or like safety means along the route or between vehicles6
Recent patents
- Methods and systems for decentralized rail signaling and positive train control6 Oct 2026US 12,752,823 B2Metrom Rail, LLC
- Intrusion detection6 Oct 2026US 12,752,827 B2International Electronic Machines Corp.
- Method for carrying out an emergency stop for a train22 Sep 2026US 12,741,681 B2Siemens Mobility GmbH
- Sensor to sensor edge traffic inference, system and method22 Sep 2026US 12,741,683 B2Konux GmbH
- Systems and methods for detecting tanks in railway environments1 Sep 2026US 12,722,670 B2BNSF Railway Company
- Rail guided carriage system and method for estimating abnormal section of rail guided carriage system8 Oct 2026US 2026/0307689 A1Murata Machinery, Ltd.
- Railroad virtual track block system8 Oct 2026US 2026/0307691 A1BNSF Railway Company
- System and method for improved rail bridge strike detection8 Oct 2026US 2026/0307692 A1Southern Methodist University
- Connector and system8 Oct 2026US 2026/0312341 A1HARTING International Innovation AG
- Autonomous track monitoring system1 Oct 2026US 2026/0296510 A1
Most cited
By later US patents
- Surround surveillance system for mobile body, and mobile body, car, and train using the same238US 6,693,518 B2Sharp Kabushiki Kaisha · 2004
- Ground-based mobile maintenance facilities for unmanned aerial vehicles189US 9,718,564 B1Amazon Technologies, Inc. · 2017
- Intelligent transport system176US 6,810,817 B12004
- Automatic vehicle following control system173US 6,128,559 AHonda Giken Kogyo Kabushiki Kaisha · 2000
- Transducer and interrogator device148US 5,701,121 AMagellan Technology Pty Limited · 1997