B61L 29/226
Using track-circuits, closed or short-circuited by train or using isolated rail-sections
Official title: {using track-circuits, closed or short-circuited by train or using isolated rail-sections}
B61L29/226 (Using track-circuits, closed or short-circuited by train or using isolated rail-sections) appears on 27 US grants and 28 published applications in this corpus.
Search patents in B61L- Granted patents
- 27
- Published applications
- 28
- Assignees
- 14
- Inventors
- 47
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 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 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 1 | 0 |
| 2013 | 0 | 1 |
| 2014 | 3 | 3 |
| 2015 | 1 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 3 |
| 2019 | 1 | 0 |
| 2020 | 2 | 2 |
| 2021 | 1 | 4 |
| 2022 | 2 | 4 |
| 2023 | 2 | 3 |
| 2024 | 2 | 1 |
| 2025 | 3 | 1 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Grade crossing system including grade crossing predictor in electrified propulsion territory1 Sep 2026US 12,722,676 B2Siemens Mobility GmbH
- Railway detection system, railway infrastructure and method for detecting the presence of a railway vehicle2 Jun 2026US 12,643,583 B2
- Railroad crossing control system with auxiliary shunting device28 Apr 2026US 12,612,091 B2Siemens Mobility GmbH
- Train simulator test set and method therefor30 Dec 2025US 12,509,131 B2BNSF Railway Company
- Grade crossing control system and method for determining track circuit impedance27 May 2025US 12,311,990 B2Siemens Mobility GmbH
- Intersection management system17 Sep 2026US 2026/0274316 A1Transportation IP Holdings, LLC
- Train simulator test set and method therefor7 May 2026US 2026/0125087 A1BNSF Railway Company
- Grade crossing system including grade crossing predictor in electrified propulsion territory12 Jun 2025US 2025/0187496 A1Siemens Mobility GmbH
- Railway detection system, railway infrastructure and method for detecting the presence of a railway vehicle9 May 2024US 2024/0149931 A1ALSTOM Holdings
- Grade crossing control system and method for determining track circuit impedance12 Oct 2023US 2023/0322283 A1Siemens Mobility GmbH
Most cited
By later US patents
- Processing system for grade crossing warning29US 4,581,700 ASAB Harmon Industries, Inc. · 1986
- Digital train system for automatically detecting trains approaching a crossing24US 7,254,467 B2General Electric Company · 2007
- Train approach detector23US 4,365,777 AModern Industries Signal Equipment, Inc. · 1982
- Crossing predictor with authorized track speed input15US 8,297,558 B2Safetran Systems Corporation · 2012
- Multi-frequency railroad grade crossing termination shunt assembly9US 5,029,780 ASafetran Systems Corporation · 1991