F21K
Non-electric light sources using luminescence
Official title: Non-electric light sources using luminescence; light sources using electrochemiluminescence; light sources using charges of combustible material; light sources using semiconductor devices as light-generating elements; light sources not otherwise provided for
F21K (Non-electric light sources using luminescence) appears on 11,494 US grants and 14,069 published applications in this corpus.
Search patents in F21K- Granted patents
- 11,494
- Published applications
- 14,069
- Assignees
- 3,018
- Inventors
- 14,879
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 33 | 0 |
| 1977 | 27 | 0 |
| 1978 | 16 | 0 |
| 1979 | 6 | 0 |
| 1980 | 25 | 0 |
| 1981 | 16 | 0 |
| 1982 | 13 | 0 |
| 1983 | 15 | 0 |
| 1984 | 8 | 0 |
| 1985 | 6 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 10 | 0 |
| 1989 | 6 | 0 |
| 1990 | 10 | 0 |
| 1991 | 9 | 0 |
| 1992 | 11 | 0 |
| 1993 | 11 | 0 |
| 1994 | 12 | 0 |
| 1995 | 21 | 0 |
| 1996 | 19 | 0 |
| 1997 | 24 | 0 |
| 1998 | 28 | 0 |
| 1999 | 29 | 0 |
| 2000 | 24 | 0 |
| 2001 | 29 | 5 |
| 2002 | 32 | 66 |
| 2003 | 51 | 76 |
| 2004 | 66 | 124 |
| 2005 | 59 | 186 |
| 2006 | 95 | 239 |
| 2007 | 122 | 265 |
| 2008 | 110 | 371 |
| 2009 | 187 | 564 |
| 2010 | 330 | 753 |
| 2011 | 400 | 861 |
| 2012 | 504 | 953 |
| 2013 | 690 | 1078 |
| 2014 | 786 | 1285 |
| 2015 | 820 | 1219 |
| 2016 | 948 | 928 |
| 2017 | 904 | 823 |
| 2018 | 860 | 869 |
| 2019 | 974 | 798 |
| 2020 | 803 | 712 |
| 2021 | 655 | 522 |
| 2022 | 487 | 394 |
| 2023 | 409 | 345 |
| 2024 | 395 | 289 |
| 2025 | 270 | 206 |
| 2026 | 120 | 138 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
Recent patents
- Emitter assembly for a lighting device6 Oct 2026US 12,753,886 B2Lutron Technology Company LLC
- LED light source comprising hollow pedestal supporting transparent optical element6 Oct 2026US 12,753,887 B2Lumileds LLC
- Lighting module, lighting device and lamp6 Oct 2026US 12,753,888 B2LG Innotek Co., Ltd.
- Luminaire with replaceable LED board6 Oct 2026US 12,753,907 B2Halco Lighting Technologies, LLC
- LED lamp and misuse warning module thereof29 Sep 2026US 12,747,836 B2Jiaxing Super Lighting Electric Appliance Co., Ltd
- Lighting element with insect repelling element8 Oct 2026US 2026/0305598 A1PIC Corporation
- Lightbars with emission collecting optical modules8 Oct 2026US 2026/0309310 A1Whelen Engineering Company, Inc.
- Wireless controllable lighting device8 Oct 2026US 2026/0309313 A1Lutron Technology Company LLC
- Solid State Lamp Using Light Emitting Strips1 Oct 2026US 2026/0298419 A1Quarkstar LLC
- Led filament and light bulb using the same1 Oct 2026US 2026/0298420 A1Jiaxing Super Lighting Electric Appliance Co., Ltd
Most cited
By later US patents
- Illumination components1,698US 6,211,626 B1Color Kinetics Incorporated · 2001
- Multicolored LED lighting method and apparatus1,174US 6,016,038 AColor Kinetics Incorporated · 2000
- Lighting entertainment system987US 6,166,496 AColor Kinetics Incorporated · 2000
- Lighting device and lighting method856US 7,213,940 B1LED Lighting Fixtures, Inc. · 2007
- Multicolored LED lighting method and apparatus852US 6,150,774 AColor Kinetics Incorporated · 2000