F24F 11/75
For maintaining constant air flow rate or air velocity
Official title: for maintaining constant air flow rate or air velocity
F24F11/75 (For maintaining constant air flow rate or air velocity) appears on 236 US grants and 202 published applications in this corpus.
Search patents in F24F- Granted patents
- 236
- Published applications
- 202
- Assignees
- 91
- Inventors
- 288
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 5 | 0 |
| 1978 | 6 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 0 | 0 |
| 1987 | 6 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 7 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 3 |
| 2004 | 1 | 4 |
| 2005 | 2 | 1 |
| 2006 | 3 | 3 |
| 2007 | 3 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 3 |
| 2010 | 1 | 5 |
| 2011 | 2 | 13 |
| 2012 | 4 | 10 |
| 2013 | 8 | 10 |
| 2014 | 7 | 9 |
| 2015 | 11 | 33 |
| 2016 | 8 | 20 |
| 2017 | 14 | 17 |
| 2018 | 24 | 9 |
| 2019 | 13 | 14 |
| 2020 | 16 | 12 |
| 2021 | 11 | 7 |
| 2022 | 7 | 6 |
| 2023 | 9 | 6 |
| 2024 | 7 | 10 |
| 2025 | 4 | 3 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method, system and computer program product for controlling an HVAC system5 May 2026US 12,618,583 B2Belimo Holding AG
- Energy management method24 Mar 2026US 12,585,298 B2Samsung Electronics Co., Ltd.
- Flowrate determination system and method for a flow control valve14 Oct 2025US 12,442,556 B2Tyco Fire & Security GmbH
- Apparatus for controlling fan motor, air conditioning system and constant airflow control method of apparatus for controlling fan motor23 Sep 2025US 12,422,160 B2LG Electronics Inc.
- Method for controlling draught fan, and draught fan device9 Sep 2025US 12,410,807 B2Gd Midea Heating & Ventilating Equipment Co., Ltd.
- Flowrate determination system and method for a flow control valve18 Dec 2025US 2025/0383111 A1Tyco Fire & Security GmbH
- Systems and methods for controlling an electric blower motor in a fluid moving system25 Sep 2025US 2025/0297762 A1Regal Beloit America, Inc.
- Air volume control valve capable of accurately measuring air volume9 Jan 2025US 2025/0012475 A1Tongzhou Lanhai (Beijing) Holding Co.,Ltd
- Controller and method for managing a flow unit7 Nov 2024US 2024/0369248 A1Siemens Industry, Inc.
- Air Treatment Device11 Jul 2024US 2024/0230120 A9Belimo Holding AG
Most cited
By later US patents
- Energy management system225US 8,024,073 B2Allure Energy, Inc. · 2011
- Dri-Pc humidity and temperature controller164US 4,841,733 A1989
- Mobile energy management system159US 8,174,381 B2Allure Energy, Inc. · 2012
- Multi-network communication interfaces for wireless energy networks138US 8,099,195 B2Allure Energy, Inc. · 2012
- Zone based system for altering temperature setpoints138US 8,108,076 B2Allure Energy, Inc. · 2012