F21V 21/36
Hoisting or lowering devices
Official title: Hoisting or lowering devices, e.g. for maintenance
F21V21/36 (Hoisting or lowering devices) appears on 217 US grants and 197 published applications in this corpus.
Search patents in F21V- Granted patents
- 217
- Published applications
- 197
- Assignees
- 136
- Inventors
- 387
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 1 | 0 |
| 1982 | 5 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 6 | 0 |
| 1997 | 0 | 0 |
| 1998 | 5 | 0 |
| 1999 | 3 | 0 |
| 2000 | 8 | 0 |
| 2001 | 1 | 0 |
| 2002 | 5 | 0 |
| 2003 | 2 | 2 |
| 2004 | 1 | 6 |
| 2005 | 4 | 4 |
| 2006 | 3 | 3 |
| 2007 | 5 | 3 |
| 2008 | 2 | 6 |
| 2009 | 3 | 4 |
| 2010 | 2 | 9 |
| 2011 | 2 | 3 |
| 2012 | 4 | 7 |
| 2013 | 8 | 7 |
| 2014 | 5 | 7 |
| 2015 | 3 | 10 |
| 2016 | 2 | 9 |
| 2017 | 6 | 10 |
| 2018 | 6 | 7 |
| 2019 | 8 | 10 |
| 2020 | 11 | 15 |
| 2021 | 10 | 16 |
| 2022 | 10 | 12 |
| 2023 | 14 | 17 |
| 2024 | 19 | 19 |
| 2025 | 6 | 6 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for hanging decorative elements at an elevated height28 Apr 2026US 12,613,026 B2Simple Living Solutions, LLC
- Height adjustable lamp3 Mar 2026US 12,565,986 B2Hatco Corporation
- Crown deck lighting system27 Jan 2026US 12,535,201 B2Nabors Drilling Technologies USA, Inc.
- Portable area light4 Nov 2025US 12,460,799 B2Milwaukee Electric Tool Corporation
- Ceiling fixture accessibility device20 May 2025US 12,304,784 B2Seas II Day, LLC
- Light fixture hoist1 Oct 2026US 2026/0298454 A1
- Height adjustable heatlamp18 Jun 2026US 2026/0168659 A1Hatco Corporation
- Light tracking system and associated methods11 Jun 2026US 2026/0160407 A1Na’cho Production and Design, LLC
- Portable area light14 May 2026US 2026/0132898 A1Milwaukee Electric Tool Corporation
- Crown deck lighting system12 Mar 2026US 2026/0071740 A1Nabors Drilling Technologies USA, Inc.
Most cited
By later US patents
- Recessed lamp fixture123US 5,857,766 AProgress Lighting, LLC · 1999
- Recessed lamp fixture121US 5,758,959 AProgress Lighting, LLC · 1998
- Mobile lighting fixture, method and boom82US 4,423,471 AMycro-Group Company · 1983
- Recessed lamp fixture78US 6,004,011 AProgress Lighting, LLC · 1999
- Vertically adjustable device for suspending a frame provided with lighting, with radiators or the like72US 4,358,817 ALohmann-Werke GmbH & Co. KG · 1982