E01F 9/20
Use of light guides
Official title: Use of light guides, e.g. fibre-optic devices
E01F9/20 (Use of light guides) appears on 40 US grants and 35 published applications in this corpus.
Search patents in E01F- Granted patents
- 40
- Published applications
- 35
- Assignees
- 25
- Inventors
- 114
- Latest grant
- 30 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 3 |
| 2003 | 6 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 1 |
| 2006 | 2 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 4 |
| 2017 | 3 | 4 |
| 2018 | 1 | 1 |
| 2019 | 1 | 4 |
| 2020 | 3 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 5 |
| 2023 | 0 | 1 |
| 2024 | 3 | 0 |
| 2025 | 2 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Illuminated sensing edge assembly for swing gate barrier system30 Sep 2025US 12,429,179 B2Miller Edge, Inc.
- Road safety barrier assembly4 Mar 2025US 12,241,213 B2
- System for illuminating a carriageway in a case of fog30 Jul 2024US 12,049,736 B2
- Vision guide with light guiding rod and guard cable using same9 Jul 2024US 12,031,281 B2Fukuvi Chemical Industry Co., Ltd.
- Temporary light strip system2 Jan 2024US 11,859,356 B2Evolutionary Markings, Inc.
- Illuminated Sensing Edge Assembly For Swing Gate Barrier System30 Jan 2025US 2025/0035274 A1Miller Edge, Inc.
- Highways and roads lighting9 Feb 2023US 2023/0039140 A1
- System for illuminating a carriageway in a case of fog15 Sep 2022US 2022/0290387 A1
- Vision guide with light guiding rod and guard cable using same7 Jul 2022US 2022/0213657 A1Fukuvi Chemical Industry Co., Ltd.
- Road safety barrier assembly19 May 2022US 2022/0154414 A1
Most cited
By later US patents
- Method for optically marking an elongated indication path and devices using same58US 6,592,245 B12003
- Illumination system54US 6,082,886 A2000
- Waterproof lighting apparatus52US 6,030,108 ABridgestone Corporation · 2000
- Solar-powered illuminated reflector50US 4,668,120 A1987
- Road-marking complex and system for marking roads30US 6,305,874 B1U. S. Philips Corporation · 2001