B61L 21/06
Vehicle-on-line indication
Official title: Vehicle-on-line indication; Monitoring locking and release of the route
B61L21/06 (Vehicle-on-line indication) appears on 22 US grants and 18 published applications in this corpus.
Search patents in B61L- Granted patents
- 22
- Published applications
- 18
- Assignees
- 17
- Inventors
- 46
- Latest grant
- 6 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 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 | 1 |
| 2004 | 1 | 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 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 2 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 2 | 2 |
| 2021 | 0 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 2 |
| 2024 | 2 | 3 |
| 2025 | 2 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Rail planning system6 Jan 2026US 12,515,722 B2Technological Resources Pty. Limited
- Accurate detection of track occupancy within train tracking systems17 Jun 2025US 12,330,701 B2Siemens Mobility GmbH
- Method and apparatus for a train control system7 Jan 2025US 12,187,333 B2
- Multi-objective systems and methods for optimally assigning train blocks at a railroad merchandise yard31 Dec 2024US 12,179,819 B2BNSF Railway Company
- Method and apparatus for a train control system2 Apr 2024US 11,945,483 B2
- Multi-objective systems and methods for optimally assigning train blocks at a railroad merchandise yard27 Nov 2025US 2025/0360952 A1BNSF Railway Company
- Method & apparatus for a train control system22 May 2025US 2025/0162627 A1
- Accurate detection of track occupancy within train tracking systems27 Mar 2025US 2025/0100600 A1Siemens Mobility GmbH
- Multi-objective systems and methods for optimally assigning train blocks at a railroad merchandise yard19 Sep 2024US 2024/0308555 A1BNSF Railway Company
- Method and apparatus for a train control system25 Jul 2024US 2024/0246588 A1
Most cited
By later US patents
- Pulse code system for railroad track circuits30US 4,619,425 AAmerican Standard Inc. · 1986
- Fail-safe decoder for digital track circuits22US 4,320,881 AAmerican Standard Inc. · 1982
- Control system for railroads20US 3,976,272 AGeneral Signal Corporation · 1976
- Railroad interlocking signal system with insulated joint failure and overrun protection14US 4,181,278 AWestinghouse Air Brake Company · 1980
- System for indicating track sections in an interlocking area as occupied or unoccupied13US 4,763,267 AAlcatel · 1988