B61L 29/04
Gates for level crossings
B61L29/04 (Gates for level crossings) appears on 83 US grants and 69 published applications in this corpus.
Search patents in B61L- Granted patents
- 83
- Published applications
- 69
- Assignees
- 38
- Inventors
- 109
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 0 |
| 2002 | 1 | 4 |
| 2003 | 1 | 0 |
| 2004 | 1 | 3 |
| 2005 | 1 | 3 |
| 2006 | 2 | 1 |
| 2007 | 1 | 2 |
| 2008 | 4 | 3 |
| 2009 | 2 | 2 |
| 2010 | 1 | 0 |
| 2011 | 1 | 1 |
| 2012 | 2 | 0 |
| 2013 | 3 | 3 |
| 2014 | 2 | 4 |
| 2015 | 2 | 2 |
| 2016 | 2 | 1 |
| 2017 | 4 | 4 |
| 2018 | 0 | 2 |
| 2019 | 3 | 3 |
| 2020 | 0 | 1 |
| 2021 | 2 | 9 |
| 2022 | 7 | 7 |
| 2023 | 6 | 4 |
| 2024 | 9 | 5 |
| 2025 | 2 | 4 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Crossing gate mechanism with integrated position detection and angle measurement21 Jul 2026US 12,686,426 B2Siemens Mobility GmbH
- Automated counterbalance system and method for determining counterbalance and adjusting counterweights of a crossing gate12 Aug 2025US 12,384,435 B2Siemens Mobility GmbH
- Device and method for detecting an obstruction of a railroad crossing gate12 Aug 2025US 12,384,436 B2Siemens Mobility GmbH
- Railroad crossing gate lamp system17 Dec 2024US 12,169,056 B2Railway Equipment Company, Inc.
- Dynamic load system and method for simulating a crossing gate mechanism17 Sep 2024US 12,095,401 B2Siemens Mobility GmbH
- Conduitless crossing gate with swivel support for crossing gate mechanism26 Mar 2026US 2026/0084733 A1Siemens Mobility GmbH
- Devices and methods for controlling a railroad crossing gate mechanism27 Nov 2025US 2025/0360954 A1Siemens Mobility GmbH
- Providing auto-calibration of accelerometer and/or hall-sense position counter in a crossing gate mechanism30 Oct 2025US 2025/0334430 A1Siemens Mobility GmbH
- Railroad crossing gate lamp system24 Jul 2025US 2025/0237370 A1Railway Equipment Company, Inc.
- Crossing gate mechanism with programmable electronic switching devices20 Feb 2025US 2025/0058808 A1Siemens Mobility GmbH
Most cited
By later US patents
- Swinging lift gate60US 4,658,543 A1987
- Multipurpose energy absorbing barrier system48US 5,823,705 AThe Entwistle Company · 1998
- Terrorist vehicle barrier41US 4,780,020 A1988
- Energy absorbing barrier system with crash indication40US 5,624,203 AThe Entwistle Company · 1997
- Railroad crossing gate37US 4,897,960 AGeneral Signals, Inc. · 1990