F21V 29/51
Using condensation or evaporation of a fluid
Official title: using condensation or evaporation of a fluid, e.g. heat pipes
F21V29/51 (Using condensation or evaporation of a fluid) appears on 528 US grants and 665 published applications in this corpus.
Search patents in F21V- Granted patents
- 528
- Published applications
- 665
- Assignees
- 313
- Inventors
- 989
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 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 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 3 |
| 2004 | 1 | 7 |
| 2005 | 4 | 5 |
| 2006 | 6 | 20 |
| 2007 | 10 | 33 |
| 2008 | 20 | 58 |
| 2009 | 30 | 79 |
| 2010 | 48 | 69 |
| 2011 | 55 | 55 |
| 2012 | 44 | 47 |
| 2013 | 44 | 39 |
| 2014 | 45 | 32 |
| 2015 | 16 | 29 |
| 2016 | 31 | 30 |
| 2017 | 21 | 22 |
| 2018 | 22 | 26 |
| 2019 | 27 | 19 |
| 2020 | 16 | 19 |
| 2021 | 20 | 17 |
| 2022 | 20 | 22 |
| 2023 | 16 | 15 |
| 2024 | 13 | 4 |
| 2025 | 3 | 7 |
| 2026 | 7 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- LED luminaire thermal management system18 Aug 2026US 12,710,171 B2
- Light emitting device with heat spacer2 Jun 2026US 12,644,590 B2Signify Holding B. V.
- Lighting devices having optical waveguides for controlled light distribution19 May 2026US 12,631,303 B2Cree Lighting USA LLC
- System for an optical device including light mixing rod and resilient member24 Mar 2026US 12,584,610 B2Harman Professional Denmark ApS
- Vapor chamber assembly3 Mar 2026US 12,566,032 B2Signify Holding B. V.
- Led luminaire thermal management system1 Oct 2026US 2026/0298456 A1FOHSE Inc.
- Heat dissipation device30 Jul 2026US 2026/0218988 A1Kmw Inc.
- Heat dissipation apparatus23 Jul 2026US 2026/0210643 A1Kmw Inc.
- Lightning apparatus9 Jul 2026US 2026/0194220 A1Gigatera Lighting Inc.
- Cooled light source apparatus and projection type image display apparatus with noise-reducing fan system21 May 2026US 2026/0140430 A1Maxell, Ltd.
Most cited
By later US patents
- Signal light unit having heat dissipating function456US 4,729,076 A1988
- LED lamp with a heat sink assembly229US 7,434,964 B1Foxconn Technology Co., Ltd. · 2008
- Modular lighting systems209US 8,232,745 B2Digital Lumens Incorporated · 2012
- LED-based lighting methods, apparatus, and systems employing LED light bars, occupancy sensing, local state machine, and meter circuit196US 8,138,690 B2Digital Lumens Incorporated · 2012
- Heat dissipating apparatus for lighting utility149US 7,144,140 B22006