B61L 29/28
Electrically operated
Official title: electrically operated
B61L29/28 (Electrically operated) appears on 242 US grants and 258 published applications in this corpus.
Search patents in B61L- Granted patents
- 242
- Published applications
- 258
- Assignees
- 102
- Inventors
- 392
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 1 |
| 2002 | 6 | 3 |
| 2003 | 2 | 1 |
| 2004 | 1 | 6 |
| 2005 | 1 | 7 |
| 2006 | 4 | 11 |
| 2007 | 3 | 5 |
| 2008 | 5 | 8 |
| 2009 | 2 | 5 |
| 2010 | 5 | 2 |
| 2011 | 3 | 7 |
| 2012 | 4 | 6 |
| 2013 | 10 | 15 |
| 2014 | 9 | 13 |
| 2015 | 9 | 9 |
| 2016 | 9 | 8 |
| 2017 | 9 | 12 |
| 2018 | 8 | 16 |
| 2019 | 13 | 20 |
| 2020 | 17 | 13 |
| 2021 | 15 | 23 |
| 2022 | 13 | 14 |
| 2023 | 12 | 18 |
| 2024 | 17 | 14 |
| 2025 | 13 | 15 |
| 2026 | 10 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B61L 29/30Supervision123
- B61L 29/32Timing58
- B61L 29/284Using rail-contacts, rail microphones, or the like, controlled by the vehicle22
- B61L 29/286Using conductor circuits controlled by the vehicle20
- B61L 29/282Magnetic or inductive control by the vehicle18
- B61L 29/288Wiring diagram of the signal control circuits14
Recent patents
- Intrusion detection6 Oct 2026US 12,752,827 B2International Electronic Machines Corp.
- Railroad crossing warning system for enhanced route planning based on spectrogram analysis1 Sep 2026US 12,722,675 B2
- Grade crossing system including grade crossing predictor in electrified propulsion territory1 Sep 2026US 12,722,676 B2Siemens Mobility GmbH
- Warning light assembly with orientation sensor, and railway crossing installation including the same14 Jul 2026US 12,680,686 B2Railway Equipment Company, Inc.
- Vehicle system and method9 Jun 2026US 12,649,504 B2Transportation IP Holdings, LLC
- Systems and methods with enhanced predictive railroad crossing traffic notification and railroad worker safety notification2 Jul 2026US 2026/0184357 A1
- Railway control and field device switching system25 Jun 2026US 2026/0181046 A1Hitachi Rail Sts USA, Inc.
- Methods and systems for ultra-wideband (uwb) based subway personnel detection2 Apr 2026US 2026/0093024 A1Metrom Rail, LLC
- Method for monitoring a track section, railroad system, computer program product and computer-readable storage medium2 Apr 2026US 2026/0094452 A1Siemens Mobility GmbH
- Systems and methods for remote activation of railroad crossing signals12 Feb 2026US 2026/0042474 A1BNSF Railway Company
Most cited
By later US patents
- Traffic warning system107US 7,075,427 B1EVA Signal Corporation · 2006
- Wireless train proximity alert system95US 5,554,982 AHughes Aircraft Company · 1996
- Railway train signalling system for remotely operating warning devices at crossings and for receiving warning device operational information86US 5,620,155 A1997
- Video detection apparatus for monitoring a railroad crossing68US 5,825,412 AEsco Electronics Corporation · 1998
- Autonomous vehicle railroad crossing warning system68US 7,769,544 B2Ansaldo STS USA, Inc. · 2010