F21V 21/20
Operated by weights
Official title: operated by weights
F21V21/20 (Operated by weights) appears on 15 US grants and 10 published applications in this corpus.
Search patents in F21V- Granted patents
- 15
- Published applications
- 10
- Assignees
- 10
- Inventors
- 28
- Latest grant
- 16 May 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 2 |
| 2015 | 1 | 1 |
| 2016 | 3 | 2 |
| 2017 | 2 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Manufacturing of light emitting modules16 May 2023US 11,649,951 B1Tractor Supply Company
- Light guide for low profile luminaire26 Dec 2017US 9,851,490 B2Lighting Science Group Corporation
- Light guide for low profile luminaire28 Feb 2017US 9,581,756 B2Lighting Science Group Corporation
- Low profile luminaire and associated systems and methods6 Sep 2016US 9,435,930 B2Lighting Science Group Corporation
- Chandelier with counterweight height adjustment system22 Mar 2016US 9,291,336 B2
- Lighting device with adjustable inclination28 Nov 2024US 2024/0392956 A1Equilibrio
- Manufacturing of light emitting modules8 Jun 2023US 2023/0175673 A1Tractor Supply Company
- Light guide for low profile luminaire18 May 2017US 2017/0139108 A1Lighting Science Group Corporation
- Light guide for low profile luminaire22 Dec 2016US 2016/0370535 A1Lighting Science Group Corporation
- Low profile luminaire and associated systems and methods14 Jan 2016US 2016/0011358 A1Lighting Science Group Corporation
Most cited
By later US patents
- Swings out of the way articulated magnifying lamp30US 5,613,771 A1997
- Variable radius multi-lamp illumination system26US 9,228,730 B1The United States of America as represented by the Secretary of the Air Force · 2016
- Lamp with decorative element when illuminated17US 6,742,915 B1Bruck Lighting Systems, Inc. · 2004
- Suspended electric lamp15US 5,025,357 A1991
- Light guide for low profile luminaire8US 9,581,756 B2Lighting Science Group Corporation · 2017