F21V 5/04
Refractors for light sources: of lens shape
Official title: of lens shape
F21V5/04 (Refractors for light sources: of lens shape) appears on 4,137 US grants and 4,571 published applications in this corpus.
Search patents in F21V- Granted patents
- 4,137
- Published applications
- 4,571
- Assignees
- 1,529
- Inventors
- 6,287
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 4 | 0 |
| 1987 | 6 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 11 | 0 |
| 1991 | 5 | 0 |
| 1992 | 8 | 0 |
| 1993 | 4 | 0 |
| 1994 | 7 | 0 |
| 1995 | 7 | 0 |
| 1996 | 11 | 0 |
| 1997 | 14 | 0 |
| 1998 | 18 | 0 |
| 1999 | 19 | 0 |
| 2000 | 24 | 0 |
| 2001 | 31 | 6 |
| 2002 | 14 | 34 |
| 2003 | 39 | 30 |
| 2004 | 30 | 55 |
| 2005 | 34 | 66 |
| 2006 | 39 | 85 |
| 2007 | 54 | 56 |
| 2008 | 47 | 94 |
| 2009 | 55 | 93 |
| 2010 | 73 | 166 |
| 2011 | 105 | 186 |
| 2012 | 111 | 214 |
| 2013 | 153 | 270 |
| 2014 | 174 | 288 |
| 2015 | 220 | 351 |
| 2016 | 266 | 292 |
| 2017 | 307 | 340 |
| 2018 | 295 | 353 |
| 2019 | 404 | 331 |
| 2020 | 350 | 277 |
| 2021 | 317 | 229 |
| 2022 | 233 | 205 |
| 2023 | 206 | 147 |
| 2024 | 184 | 164 |
| 2025 | 141 | 128 |
| 2026 | 84 | 111 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Box-shaped light fixture with diffuser lens having a plurality of diffractive ribs22 Sep 2026US 12,742,537 B2Maxlite, Inc.
- Screwing tool15 Sep 2026US 12,734,648 B2Makita Corporation
- Airframe system and method of controlling airflow8 Oct 2026US 2026/0306210 A1SLD Technology, Inc.
- Lighting device8 Oct 2026US 2026/0309304 A1Signify Holding B. V.
- Wide-angle emission collecting optical systems8 Oct 2026US 2026/0309305 A1Whelen Engineering Company, Inc.
- Lightbars with emission collecting optical modules8 Oct 2026US 2026/0309310 A1Whelen Engineering Company, Inc.
- Led device and led light fixture8 Oct 2026US 2026/0309321 A1Shanghai Weili Advanced Electronic Technology Co., Ltd.
Most cited
By later US patents
- Luminaire508US 6,250,774 B1U. S. Philips Corporation · 2001
- Vehicular lamp502US 4,733,335 AKoito Manufacturing Co., Ltd. · 1988
- Computer controlled lighting system having automatically variable position, color, intensity and beam divergence386US 4,392,187 AVari-Lite, Inc. · 1983
- LED replacement for fluorescent lighting371US 6,860,628 B22005
- Side emitting light emitting device337US 6,598,998 B2Lumileds Lighting U.S., LLC · 2003