F21S 45/47
Passive cooling
Official title: Passive cooling, e.g. using fins, thermal conductive elements or openings
F21S45/47 (Passive cooling) appears on 1,528 US grants and 1,705 published applications in this corpus.
Search patents in F21S- Granted patents
- 1,528
- Published applications
- 1,705
- Assignees
- 396
- Inventors
- 2,461
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 9 | 4 |
| 2002 | 10 | 14 |
| 2003 | 12 | 18 |
| 2004 | 16 | 24 |
| 2005 | 12 | 32 |
| 2006 | 25 | 31 |
| 2007 | 30 | 35 |
| 2008 | 19 | 50 |
| 2009 | 26 | 51 |
| 2010 | 46 | 59 |
| 2011 | 27 | 38 |
| 2012 | 42 | 45 |
| 2013 | 43 | 62 |
| 2014 | 44 | 84 |
| 2015 | 62 | 114 |
| 2016 | 71 | 134 |
| 2017 | 108 | 134 |
| 2018 | 132 | 150 |
| 2019 | 190 | 124 |
| 2020 | 125 | 84 |
| 2021 | 95 | 84 |
| 2022 | 85 | 96 |
| 2023 | 88 | 77 |
| 2024 | 85 | 74 |
| 2025 | 65 | 47 |
| 2026 | 32 | 40 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Vehicle lamp6 Oct 2026US 12,753,896 B2SL Corporation
- Automotive modules and methods for controlling thereof22 Sep 2026US 12,742,535 B2ams-OSRAM International GmbH
- Heat sink for electronic component and associated manufacturing method22 Sep 2026US 12,742,541 B2Valeo Vision
- Light module for a motor vehicle lighting device, and method for producing a light module8 Sep 2026US 12,729,828 B2Hella GmbH & Co. KGaA
- Heat exhaust structure for headlamp1 Sep 2026US 12,723,733 B2Suzuki Motor Corporation
- Snap-in lighthead assembly for lightbar8 Oct 2026US 2026/0309297 A1Whelen Engineering Company, Inc.
- Integrated lamp control modules24 Sep 2026US 2026/0287135 A1
- Headlight24 Sep 2026US 2026/0287158 A1TJM Design Corporation
- Linear light-emitting device, lamp assembly, and vehicle17 Sep 2026US 2026/0276166 A1Valeo Vision
- Lighting device with embedded electronics17 Sep 2026US 2026/0276171 A1
Most cited
By later US patents
- LED vehicle lamp assembly654US 5,632,551 AGrote Industries, Inc. · 1997
- Indicators and illuminators using a semiconductor radiation emitter package518US 6,441,943 B1Gentex Corporation · 2002
- Vehicular lamp502US 4,733,335 AKoito Manufacturing Co., Ltd. · 1988
- Illuminating device487US 5,136,483 A1992
- Thermal management system for L.E.D. arrays482US 5,857,767 ARelume Corporation · 1999