F24F 13/24
Means for preventing or suppressing noise
F24F13/24 (Means for preventing or suppressing noise) appears on 745 US grants and 822 published applications in this corpus.
Search patents in F24F- Granted patents
- 745
- Published applications
- 822
- Assignees
- 443
- Inventors
- 2,004
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 6 | 0 |
| 1982 | 6 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 7 | 0 |
| 1994 | 12 | 0 |
| 1995 | 15 | 0 |
| 1996 | 6 | 0 |
| 1997 | 8 | 0 |
| 1998 | 20 | 0 |
| 1999 | 14 | 0 |
| 2000 | 13 | 0 |
| 2001 | 15 | 3 |
| 2002 | 14 | 12 |
| 2003 | 12 | 6 |
| 2004 | 2 | 13 |
| 2005 | 5 | 11 |
| 2006 | 5 | 5 |
| 2007 | 2 | 6 |
| 2008 | 4 | 19 |
| 2009 | 3 | 12 |
| 2010 | 8 | 21 |
| 2011 | 6 | 15 |
| 2012 | 15 | 22 |
| 2013 | 10 | 26 |
| 2014 | 15 | 28 |
| 2015 | 20 | 23 |
| 2016 | 24 | 39 |
| 2017 | 28 | 43 |
| 2018 | 24 | 47 |
| 2019 | 50 | 61 |
| 2020 | 43 | 68 |
| 2021 | 37 | 80 |
| 2022 | 52 | 49 |
| 2023 | 61 | 52 |
| 2024 | 56 | 65 |
| 2025 | 42 | 59 |
| 2026 | 27 | 37 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Window air conditioner22 Sep 2026US 12,742,557 B2Gd Midea Air-Conditioning Equipment Co., Ltd.
- Sound muffler device for residential ductwork system15 Sep 2026US 12,736,252 B2
- Window-type air-conditioner8 Sep 2026US 12,729,864 B2Samsung Electronics Co., Ltd.
- Intelligent control and ventilation energy-saving muffler system based on cloud system1 Sep 2026US 12,723,771 B2Shenzhen Boheng Habitat Environment Co., Ltd.
- Air conditioner control method, air conditioner, storage medium and device25 Aug 2026US 12,716,608 B2Gd Midea Air-Conditioning Equipment Co., Ltd.
- Noise reduction control method, noise reduction control device and air conditioner8 Oct 2026US 2026/0309361 A1Gd Midea Air-Conditioning Equipment Co., Ltd.
- Silencing Assembly, Expansion Valve, and Air Conditioning System3 Sep 2026US 2026/0258967 A1Zhejiang Dunan Artificial Environment Co., Ltd.
- A centrifugal fan arrangement3 Sep 2026US 2026/0258968 A1Swegon Operations AB
- Fan, air conditioning outdoor unit, and air conditioning apparatus16 Jul 2026US 2026/0201901 A1Daikin Industries, Ltd.
- Low Noise Exhaust System16 Jul 2026US 2026/0202088 A1
Most cited
By later US patents
- Induction nozzle and arrangement388US 6,004,204 ALuminis Pty. Ltd. · 1999
- Energy management system and method183US 6,290,140 B1EnergyIQ Systems, Inc. · 2001
- Noise control of air conditioner121US 5,203,178 ANorm Pacific Automation Corp. · 1993
- Mixed flow impeller106US 4,893,990 AMatsushita Electric Industrial Co., Ltd. · 1990
- Method for optimizing the rotational speed of cooling fans105US 5,777,897 AThe United States of America as represented by the Secretary of the Navy · 1998