B61L 1/166
Optical
Official title: {Optical}
B61L1/166 (Optical) appears on 20 US grants and 26 published applications in this corpus.
Search patents in B61L- Granted patents
- 20
- Published applications
- 26
- Assignees
- 17
- Inventors
- 55
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 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 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 3 | 0 |
| 2015 | 0 | 3 |
| 2016 | 1 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 2 |
| 2019 | 1 | 0 |
| 2020 | 1 | 4 |
| 2021 | 2 | 3 |
| 2022 | 2 | 4 |
| 2023 | 1 | 3 |
| 2024 | 1 | 0 |
| 2025 | 3 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for monitoring a railway track and monitoring system for monitoring a railway track14 Apr 2026US 12,600,389 B2Sensonic GmbH
- Rail-monitoring element, method for mounting a rail-monitoring element, and method for manufacturing a rail-monitoring element2 Sep 2025US 12,405,178 B2Thales Management & Services Deutschland GmbH
- Vehicle control system29 Apr 2025US 12,286,145 B2Transportation IP Holdings, LLC
- Sensor unit with fastening element for fastening to a structure1 Apr 2025US 12,264,942 B2Thales Management & Services Deutschland GmbH
- Distributed fibre optic sensing9 Jan 2024US 11,867,541 B2Optasense Holdings Limited
- Monitoring system and method8 Oct 2026US 2026/0307694 A1Transportation IP Holdings, LLC
- Vehicle control system11 Jun 2026US 2026/0159142 A1Transportation IP Holdings, LLC
- Measuring method for detecting a mechanical force acting on an object using a fiber optic sensor unit20 Feb 2025US 2025/0060263 A1Hitachi Rail GTS Deutschland GmbH
- Method for monitoring a railway track and monitoring unit for monitoring a railway track28 Dec 2023US 2023/0415796 A1Frauscher Sensor Technology Group GmbH
- Traffic event detection apparatus, traffic event detection system, method and computer readable medium28 Dec 2023US 2023/0419822 A1NEC Corporation
Most cited
By later US patents
- Micropower impulse radar based wheel detector48US 5,764,162 AUnion Switch & Signal Inc. · 1998
- Monitoring transport network infrastructure21US 9,561,812 B2Optasense Holdings Limited · 2017
- Railway wheel sensors15US 5,129,606 AJDR Systems Corporation · 1992
- Railroad flat wheel detectors11US 5,133,521 ASel Division, Alcatel Canada Inc. · 1992
- Automated wheel slide detector9US 8,780,189 B2Lynx Engineering Consultants Pty Ltd. · 2014