B61L 25/02
Indicating or recording positions or identities of vehicles or trains
B61L25/02 (Indicating or recording positions or identities of vehicles or trains) appears on 1,468 US grants and 1,655 published applications in this corpus.
Search patents in B61L- Granted patents
- 1,468
- Published applications
- 1,655
- Assignees
- 522
- Inventors
- 2,946
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 6 | 0 |
| 1978 | 10 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 9 | 0 |
| 1982 | 5 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 8 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 9 | 0 |
| 1990 | 5 | 0 |
| 1991 | 8 | 0 |
| 1992 | 8 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 6 | 0 |
| 1996 | 4 | 0 |
| 1997 | 12 | 0 |
| 1998 | 17 | 0 |
| 1999 | 13 | 0 |
| 2000 | 12 | 0 |
| 2001 | 9 | 3 |
| 2002 | 16 | 12 |
| 2003 | 10 | 13 |
| 2004 | 12 | 22 |
| 2005 | 10 | 23 |
| 2006 | 17 | 19 |
| 2007 | 14 | 18 |
| 2008 | 9 | 16 |
| 2009 | 7 | 25 |
| 2010 | 13 | 36 |
| 2011 | 10 | 20 |
| 2012 | 29 | 37 |
| 2013 | 31 | 45 |
| 2014 | 40 | 63 |
| 2015 | 48 | 60 |
| 2016 | 73 | 132 |
| 2017 | 97 | 112 |
| 2018 | 82 | 113 |
| 2019 | 101 | 121 |
| 2020 | 89 | 141 |
| 2021 | 84 | 136 |
| 2022 | 95 | 99 |
| 2023 | 90 | 121 |
| 2024 | 113 | 103 |
| 2025 | 120 | 111 |
| 2026 | 75 | 54 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B61L 25/025Absolute localisation911
- B61L 25/021Measuring and recording of train speed498
- B61L 25/026Relative localisation242
- B61L 25/04Indicating or recording train identities231
- B61L 25/023Determination of driving direction of vehicle or train158
- B61L 25/028Determination of vehicle position and orientation within a train consist144
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
- System and method for managing autonomous robots using an autonomous robot localization system15 Sep 2026US 12,735,081 B2Flexli Technologies Private Limited
- Handbrake and impact monitoring system8 Sep 2026US 12,728,900 B2TTX Company
- 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
- Vehicle system and method1 Oct 2026US 2026/0296509 A1Transportation IP Holdings, LLC
- Methods and Systems for Automatic Track Inspection and Evaluation1 Oct 2026US 2026/0296511 A1Intramotev Inc.
- Vehicle control system and method1 Oct 2026US 2026/0296512 A1Transportation IP Holdings, LLC
Most cited
By later US patents
- Interrogation, and detection system536US 4,075,632 AThe United States of America as represented by the United States Department of Energy · 1978
- Local communication network for power reduction and enhanced reliability in a multiple node tracking system374US 5,691,980 AGeneral Electric Company · 1997
- Use of mutter mode in asset tracking for gathering data from cargo sensors327US 5,686,888 AGeneral Electric Company · 1997
- Railcar location using mutter networks and locomotive transmitter during transit292US 5,682,139 AGeneral Electric Company · 1997
- System for reading and writing data from and into remote tags276US 5,030,807 AAmtech Corporation · 1991