B61L 5/1827
Using light sources of different colours and a common optical system
Official title: {using light sources of different colours and a common optical system}
B61L5/1827 (Using light sources of different colours and a common optical system) appears on 21 US grants and 17 published applications in this corpus.
Search patents in B61L- Granted patents
- 21
- Published applications
- 17
- Assignees
- 20
- Inventors
- 37
- Latest grant
- 21 Feb 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 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 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 4 |
| 2003 | 1 | 0 |
| 2004 | 2 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 2 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 2 |
| 2015 | 2 | 1 |
| 2016 | 1 | 0 |
| 2017 | 1 | 2 |
| 2018 | 2 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Railroad color light signals including wind reduction elements21 Feb 2023US 11,584,409 B2Siemens Mobility GmbH
- Lantern and multi-functional LED light for railways16 Feb 2021US 10,919,549 B2Protran Technology, LLC
- Support frame for a temporary signal for a railroad29 Dec 2020US 10,875,556 B2Technological Resources Pty. Limited
- Indirect light mixing LED module for point-source applications16 Oct 2018US 10,100,984 B2GE Lighting Solutions, LLC
- Light source device with light splitting mirror and reflection mirror for reducing influence on uniformity of intensity distribution of beam flux, and projection device22 May 2018US 9,977,319 B2Casio Computer Co., Ltd.
- Signal communication system2 May 2024US 2024/0140508 A1Transportation IP Holdings, LLC
- Railroad color light signals including wind reduction elements3 Mar 2022US 2022/0063687 A1Siemens Mobility GmbH
- Lantern and multi-functional led light for railways5 Mar 2020US 2020/0070855 A1Focused Technology Solutions, Inc.
- Support Frame for a Temporary Signal for a Railroad12 Jul 2018US 2018/0194377 A1Technological Resources Pty. Limited
- Light source device and projection device22 Jun 2017US 2017/0176845 A1Casio Computer Co., Ltd.
Most cited
By later US patents
- Light degradation sensing LED signal with light pipe collector113US 6,717,526 B2GELcore, LLC · 2004
- LED signal lamp41US 7,883,226 B2Intematix Corporation · 2011
- Sun phantom led traffic signal38US 6,509,840 B2GELcore, LLC · 2003
- LED wayside signal for a railway33US 6,435,459 B1Dialight Corporation · 2002
- Light emitting diode module with improved light distribution uniformity23US 7,810,963 B2Dialight Corporation · 2010