F21S 4/20
Lighting devices or systems using a string or strip of light sources
Official title: with light sources held by or within elongate supports
F21S4/20 (Lighting devices or systems using a string or strip of light sources) appears on 3,186 US grants and 3,374 published applications in this corpus.
Search patents in F21S- Granted patents
- 3,186
- Published applications
- 3,374
- Assignees
- 1,330
- Inventors
- 5,086
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 7 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 7 | 0 |
| 1986 | 10 | 0 |
| 1987 | 5 | 0 |
| 1988 | 9 | 0 |
| 1989 | 9 | 0 |
| 1990 | 12 | 0 |
| 1991 | 20 | 0 |
| 1992 | 9 | 0 |
| 1993 | 12 | 0 |
| 1994 | 13 | 0 |
| 1995 | 19 | 0 |
| 1996 | 10 | 0 |
| 1997 | 21 | 0 |
| 1998 | 28 | 0 |
| 1999 | 16 | 0 |
| 2000 | 34 | 0 |
| 2001 | 46 | 6 |
| 2002 | 51 | 63 |
| 2003 | 58 | 78 |
| 2004 | 50 | 60 |
| 2005 | 40 | 92 |
| 2006 | 41 | 47 |
| 2007 | 65 | 66 |
| 2008 | 30 | 89 |
| 2009 | 32 | 85 |
| 2010 | 56 | 116 |
| 2011 | 62 | 138 |
| 2012 | 69 | 137 |
| 2013 | 91 | 124 |
| 2014 | 113 | 160 |
| 2015 | 110 | 135 |
| 2016 | 124 | 135 |
| 2017 | 148 | 187 |
| 2018 | 180 | 197 |
| 2019 | 222 | 233 |
| 2020 | 224 | 227 |
| 2021 | 262 | 224 |
| 2022 | 215 | 222 |
| 2023 | 204 | 157 |
| 2024 | 179 | 144 |
| 2025 | 170 | 150 |
| 2026 | 85 | 102 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- LED filament and a lamp29 Sep 2026US 12,747,840 B2Signify Holding B. V.
- Flexible lighting device15 Sep 2026US 12,736,192 B2
- Chain-shaped decorative lamp15 Sep 2026US 12,736,203 B1
- Spherical lighting fixture8 Sep 2026US 12,729,818 B1
- Modular multi-light source glare-shielding structure and light source module using the same8 Sep 2026US 12,729,830 B1Huizhou Hanxing Optoelectronics Technology Co., Ltd.
- Light assembly8 Oct 2026US 2026/0309288 A1Vista Manufacturing, Inc.
- Solid State Lamp Using Light Emitting Strips1 Oct 2026US 2026/0298419 A1Quarkstar LLC
- Linear luminaires and devices and methods for connecting linear luminaires1 Oct 2026US 2026/0298422 A1
- Inflatable lighting device1 Oct 2026US 2026/0298437 A1Ztarx Corporation Limited
- Module component for shoes and clothing, sole component, and luminous sports shoes24 Sep 2026US 2026/0283295 A1Sincetech (Fujian) Technology 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
- Multicolored LED lighting method and apparatus852US 6,150,774 AColor Kinetics Incorporated · 2000
- Smart light bulb852US 6,528,954 B1Color Kinetics Incorporated · 2003