F21V 21/04
Recessed bases
F21V21/04 (Recessed bases) appears on 1,410 US grants and 1,267 published applications in this corpus.
Search patents in F21V- Granted patents
- 1,410
- Published applications
- 1,267
- Assignees
- 576
- Inventors
- 1,937
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 6 | 0 |
| 1987 | 13 | 0 |
| 1988 | 7 | 0 |
| 1989 | 12 | 0 |
| 1990 | 9 | 0 |
| 1991 | 16 | 0 |
| 1992 | 10 | 0 |
| 1993 | 7 | 0 |
| 1994 | 9 | 0 |
| 1995 | 14 | 0 |
| 1996 | 8 | 0 |
| 1997 | 13 | 0 |
| 1998 | 15 | 0 |
| 1999 | 19 | 0 |
| 2000 | 20 | 0 |
| 2001 | 18 | 3 |
| 2002 | 24 | 10 |
| 2003 | 12 | 11 |
| 2004 | 10 | 12 |
| 2005 | 10 | 15 |
| 2006 | 6 | 26 |
| 2007 | 15 | 14 |
| 2008 | 11 | 32 |
| 2009 | 21 | 30 |
| 2010 | 28 | 41 |
| 2011 | 27 | 49 |
| 2012 | 36 | 34 |
| 2013 | 41 | 61 |
| 2014 | 43 | 40 |
| 2015 | 45 | 64 |
| 2016 | 52 | 51 |
| 2017 | 48 | 74 |
| 2018 | 78 | 97 |
| 2019 | 107 | 104 |
| 2020 | 131 | 92 |
| 2021 | 103 | 102 |
| 2022 | 92 | 76 |
| 2023 | 67 | 64 |
| 2024 | 71 | 70 |
| 2025 | 55 | 49 |
| 2026 | 47 | 46 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F21V 21/041Mounting arrangements specially adapted for false ceiling panels or partition walls made346
- F21V 21/048Mounting arrangements for fastening lighting devices to false ceiling frameworks259
- F21V 21/047Mounting arrangements with fastening means engaging the inner surface of a hole207
- F21V 21/049Mounting arrangements for attaching lighting devices to the ceiling, the lighting devices126
Recent patents
- Cylindrical light fixture29 Sep 2026US 12,747,855 B1
- LED luminaire with light guide and optical element29 Sep 2026US 12,748,252 B2Quarkstar LLC
- Lighting fixture22 Sep 2026US 12,742,527 B2QTran, Inc.
- Adjustable hidden panel for downlight attachment in metal ceiling22 Sep 2026US 12,742,538 B2Lucifer Lighting Company
- Airtight light fixture trim retention22 Sep 2026US 12,742,542 B2Signify Holding B. V.
- Airframe system and method of controlling airflow8 Oct 2026US 2026/0306210 A1SLD Technology, Inc.
- Track-based lighting system8 Oct 2026US 2026/0309289 A1Signify Holding B. V.
- Adjustable electrical apparatus with hangar bars for installation in a building1 Oct 2026US 2026/0298424 A1DMF, Inc.
- Lighting apparatus1 Oct 2026US 2026/0298451 A1Leedarson Lighting Co., Ltd.
- Wall wash insert for recessed lighting1 Oct 2026US 2026/0298452 A1Signify Holding B. V.
Most cited
By later US patents
- Lighting fixture with recessed baffle trim unit251US 7,722,227 B2Cordelia Lighting, Inc. · 2010
- Modular lighting fixture225US 5,738,436 AM.G. Products, Inc. · 1998
- Encapsulated explosion-proof pilot light221US 5,821,695 AAppleton Electric Company · 1998
- LED-based light-generating modules for socket engagement, and methods of assembling, installing and removing same220US 7,766,518 B2Philips Solid-State Lighting Solutions, Inc. · 2010
- Fully rotatable recessed light fixture with movable stop and adjustable length bar hanger219US 6,082,878 ACooper Industries, Inc. · 2000