B61L 2207/02
Features of light signals: using light-emitting diodes [leds]
Official title: using light-emitting diodes [LEDs]
B61L2207/02 (Features of light signals: using light-emitting diodes [leds]) appears on 91 US grants and 95 published applications in this corpus.
Search patents in B61L- Granted patents
- 91
- Published applications
- 95
- Assignees
- 56
- Inventors
- 174
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 5 |
| 2003 | 5 | 5 |
| 2004 | 3 | 3 |
| 2005 | 2 | 6 |
| 2006 | 2 | 3 |
| 2007 | 2 | 1 |
| 2008 | 2 | 4 |
| 2009 | 1 | 1 |
| 2010 | 5 | 1 |
| 2011 | 1 | 2 |
| 2012 | 1 | 2 |
| 2013 | 1 | 5 |
| 2014 | 2 | 4 |
| 2015 | 4 | 8 |
| 2016 | 6 | 7 |
| 2017 | 7 | 5 |
| 2018 | 4 | 5 |
| 2019 | 6 | 7 |
| 2020 | 2 | 4 |
| 2021 | 4 | 2 |
| 2022 | 4 | 2 |
| 2023 | 3 | 6 |
| 2024 | 6 | 4 |
| 2025 | 3 | 3 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- System and method for railroad smart flasher lamps20 Nov 2025US 2025/0358915 A1BNSF Railway Company
- Railroad crossing gate lamp system24 Jul 2025US 2025/0237370 A1Railway Equipment Company, Inc.
- Derail Warning Light System3 Jul 2025US 2025/0214634 A1Railserve, Inc.
- Light-out detection for wayside signals28 Nov 2024US 2024/0393168 A1Siemens Mobility GmbH
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Most cited
By later US patents
- LED vehicle lamp assembly654US 5,632,551 AGrote Industries, Inc. · 1997
- 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
- Led array vehicle lamp406US 5,528,474 AGrote Industries, Inc. · 1996
- Thermally protected LED array337US 5,785,418 A1998