B61L 5/12
Visible signals
B61L5/12 (Visible signals) appears on 148 US grants and 144 published applications in this corpus.
Search patents in B61L- Granted patents
- 148
- Published applications
- 144
- Assignees
- 88
- Inventors
- 312
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 5 |
| 2003 | 5 | 5 |
| 2004 | 3 | 4 |
| 2005 | 2 | 8 |
| 2006 | 7 | 6 |
| 2007 | 1 | 5 |
| 2008 | 3 | 7 |
| 2009 | 3 | 1 |
| 2010 | 5 | 3 |
| 2011 | 3 | 2 |
| 2012 | 1 | 5 |
| 2013 | 2 | 3 |
| 2014 | 2 | 9 |
| 2015 | 7 | 10 |
| 2016 | 5 | 8 |
| 2017 | 12 | 7 |
| 2018 | 4 | 12 |
| 2019 | 11 | 7 |
| 2020 | 5 | 7 |
| 2021 | 7 | 9 |
| 2022 | 7 | 4 |
| 2023 | 5 | 4 |
| 2024 | 8 | 9 |
| 2025 | 8 | 4 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Systems and methods for remotely controlling locomotives with gestures4 Nov 2025US 12,462,612 B2Cattron North America, Inc.
- System and method for railroad smart flasher lamps29 Jul 2025US 12,376,212 B2BNSF Railway Company
- Systems and methods for visual inspection of signal lights at railroad crossings8 Jul 2025US 12,354,376 B2Siemens Mobility GmbH
- System for securing communication between central controller and signaling devices in traffic signaling networks11 Mar 2025US 12,246,765 B2Tata Consultancy Services Limited
- Concealed asset locator11 Mar 2025US 12,246,766 B2Siemens Mobility GmbH
- System and method for railroad smart flasher lamps20 Nov 2025US 2025/0358915 A1BNSF Railway Company
- Culvert Marker16 Oct 2025US 2025/0319912 A1Culvert Marker Company, LLC
- Derail Warning Light System3 Jul 2025US 2025/0214634 A1Railserve, Inc.
- Autonomous sensing system for train15 May 2025US 2025/0153751 A1Casco Signal Ltd.
- System for securing communication between central controller and signaling devices in traffic signaling networks26 Dec 2024US 2024/0425094 A1Tata Consultancy Services Limited
Most cited
By later US patents
- LED lamp assembly with means to conduct heat away from the LEDS470US 6,045,240 ARelume Corporation · 2000
- Signal light unit having heat dissipating function456US 4,729,076 A1988
- Thermally protected LED array337US 5,785,418 A1998
- Circuit for interfacing between a conventional traffic signal conflict monitor and light emitting diodes replacing a conventional incandescent bulb in the signal204US 6,150,771 APrecision Solar Controls Inc. · 2000
- Light degradation sensing LED signal with light pipe collector113US 6,717,526 B2GELcore, LLC · 2004