F21S 19/005
Combining sunlight and electric light sources for indoor illumination
Official title: {Combining sunlight and electric light sources for indoor illumination}
F21S19/005 (Combining sunlight and electric light sources for indoor illumination) appears on 107 US grants and 124 published applications in this corpus.
Search patents in F21S- Granted patents
- 107
- Published applications
- 124
- Assignees
- 65
- Inventors
- 246
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 1 |
| 2004 | 0 | 3 |
| 2005 | 1 | 3 |
| 2006 | 1 | 2 |
| 2007 | 2 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 5 |
| 2011 | 2 | 6 |
| 2012 | 3 | 14 |
| 2013 | 7 | 10 |
| 2014 | 8 | 8 |
| 2015 | 5 | 12 |
| 2016 | 7 | 6 |
| 2017 | 7 | 7 |
| 2018 | 8 | 9 |
| 2019 | 8 | 4 |
| 2020 | 2 | 7 |
| 2021 | 5 | 3 |
| 2022 | 2 | 8 |
| 2023 | 5 | 2 |
| 2024 | 4 | 4 |
| 2025 | 2 | 3 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Lighting system combining daylight concentrators and an artificial source88US 4,539,625 ADHR, Incorporated · 1985
- Lighting system utilizing the sunlight81US 4,389,085 A1983
- System and method of constructing a skylight69US 5,546,712 A1996
- Lighting fixture61US 4,114,186 A1978
- Interior illumination apparatus using sunlight56US 4,306,769 A1981