F21K 9/61
Using light guides
Official title: using light guides
F21K9/61 (Using light guides) appears on 741 US grants and 924 published applications in this corpus.
Search patents in F21K- Granted patents
- 741
- Published applications
- 924
- Assignees
- 330
- Inventors
- 1,422
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 2 |
| 2004 | 1 | 6 |
| 2005 | 7 | 9 |
| 2006 | 8 | 20 |
| 2007 | 11 | 12 |
| 2008 | 7 | 18 |
| 2009 | 11 | 23 |
| 2010 | 14 | 24 |
| 2011 | 16 | 39 |
| 2012 | 21 | 57 |
| 2013 | 31 | 68 |
| 2014 | 51 | 114 |
| 2015 | 50 | 84 |
| 2016 | 69 | 60 |
| 2017 | 68 | 72 |
| 2018 | 75 | 62 |
| 2019 | 70 | 63 |
| 2020 | 45 | 49 |
| 2021 | 64 | 32 |
| 2022 | 29 | 35 |
| 2023 | 29 | 25 |
| 2024 | 25 | 19 |
| 2025 | 21 | 22 |
| 2026 | 15 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Variable light pipe illumination width levels11 Aug 2026US 12,704,228 B2Flex-N-Gate Advanced Product Development, LLC
- Lighting structure28 Jul 2026US 12,692,992 B2Silitech Technology Corp.
- Flexible lighting device and support structure28 Jul 2026US 12,692,993 B2Lumileds Singapore Pte. Ltd.
- Method for controlling light emitting assembly, light emitting assembly, and electronic apparatus21 Jul 2026US 12,687,276 B2Yinwang Intelligent Technologies Co., Ltd.
- Lighting device and vehicle lamp comprising same7 Jul 2026US 12,674,555 B2LG Innotek Co., Ltd.
- Light emitting device10 Sep 2026US 2026/0266434 A1Signify Holding B. V.
- Atmosphere lamp3 Sep 2026US 2026/0258931 A1Fuyao Glass Industry Group Co., Ltd.
- Light fixtures having waveguides and related methods6 Aug 2026US 2026/0227559 A1Lucifer Lighting Company
- Light guide columns, luminaires, and methods for manufacturing light guide columns6 Aug 2026US 2026/0227564 A1Zhongshan Zhilai Lighting Co., Ltd.
- Lighting device with light distribution body9 Jul 2026US 2026/0194204 A1Paro Holding GmbH
Most cited
By later US patents
- High output radial dispersing lamp using a solid state light source438US 6,350,041 B1Cree Lighting Company · 2002
- Optical manifold for light-emitting diodes187US 7,286,296 B2Light Prescriptions Innovators, LLC · 2007
- Illumination device174US 5,810,463 ANikon Corporation · 1998
- Optical device for repositioning and redistributing an LED's light166US 7,021,797 B2Light Prescriptions Innovators, LLC · 2006
- LED light source160US 7,246,931 B2Epistar Corporation · 2007