B61L 25/021
Measuring and recording of train speed
Official title: {Measuring and recording of train speed}
B61L25/021 (Measuring and recording of train speed) appears on 498 US grants and 575 published applications in this corpus.
Search patents in B61L- Granted patents
- 498
- Published applications
- 575
- Assignees
- 228
- Inventors
- 1,146
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 12 | 0 |
| 1999 | 6 | 0 |
| 2000 | 5 | 0 |
| 2001 | 4 | 1 |
| 2002 | 7 | 5 |
| 2003 | 5 | 9 |
| 2004 | 5 | 12 |
| 2005 | 7 | 13 |
| 2006 | 11 | 12 |
| 2007 | 5 | 7 |
| 2008 | 4 | 4 |
| 2009 | 4 | 3 |
| 2010 | 6 | 9 |
| 2011 | 5 | 6 |
| 2012 | 8 | 11 |
| 2013 | 7 | 9 |
| 2014 | 11 | 12 |
| 2015 | 12 | 14 |
| 2016 | 16 | 39 |
| 2017 | 29 | 54 |
| 2018 | 31 | 34 |
| 2019 | 34 | 51 |
| 2020 | 31 | 42 |
| 2021 | 30 | 48 |
| 2022 | 36 | 43 |
| 2023 | 23 | 45 |
| 2024 | 46 | 31 |
| 2025 | 50 | 46 |
| 2026 | 24 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Methods and systems for decentralized rail signaling and positive train control6 Oct 2026US 12,752,823 B2Metrom Rail, LLC
- Train speed estimation device and method based on vibration signals22 Sep 2026US 12,741,682 B2Aktiebolaget Skf
- Sensor to sensor edge traffic inference, system and method22 Sep 2026US 12,741,683 B2Konux GmbH
- Systems and methods for monitoring and validating status of wheel detector devices in a classification yard1 Sep 2026US 12,722,673 B2BNSF Railway Company
- Method and device for measuring a parameter relevant to the journey of a rail vehicle25 Aug 2026US 12,715,487 B2Siemens Mobility GmbH
- Apparatuses, systems, and methods for monitoring moving vehicles8 Oct 2026US 2026/0307693 A1Georgia Tech Research Corporation
- Monitoring system and method8 Oct 2026US 2026/0307694 A1Transportation IP Holdings, LLC
- Intersection management system17 Sep 2026US 2026/0274316 A1Transportation IP Holdings, LLC
- Siding assistance system6 Aug 2026US 2026/0225632 A1Transportation IP Holdings, LLC
- Device to capture high resolution images of a moving train using laser light for rail car inspection and method to use25 Jun 2026US 2026/0181263 A1
Most cited
By later US patents
- Local communication network for power reduction and enhanced reliability in a multiple node tracking system374US 5,691,980 AGeneral Electric Company · 1997
- Railcar location using mutter networks and locomotive transmitter during transit292US 5,682,139 AGeneral Electric Company · 1997
- Protocol and mechanism for primary and mutter mode communication for asset tracking211US 5,588,005 AGeneral Electric Company · 1996
- Portable self-contained tracking unit and GPS tracking system170US 6,339,397 B12002
- Rail vehicle positioning system165US 5,129,605 ARockwell International Corporation · 1992