F04D 27/003
Control: by throttling
Official title: {by throttling (F04D27/002 takes precedence)}
F04D27/003 (Control: by throttling) appears on 67 US grants and 74 published applications in this corpus.
Search patents in F04D- Granted patents
- 67
- Published applications
- 74
- Assignees
- 63
- Inventors
- 200
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 2 |
| 2004 | 2 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 0 |
| 2007 | 2 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 2 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 2 |
| 2013 | 2 | 3 |
| 2014 | 0 | 2 |
| 2015 | 2 | 2 |
| 2016 | 1 | 2 |
| 2017 | 1 | 6 |
| 2018 | 1 | 4 |
| 2019 | 6 | 7 |
| 2020 | 5 | 3 |
| 2021 | 2 | 8 |
| 2022 | 6 | 5 |
| 2023 | 8 | 6 |
| 2024 | 6 | 5 |
| 2025 | 5 | 6 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Air moving devices, aerodynamic rotor, and methods14 Apr 2026US 12,601,357 B2Whisper Aero Inc.
- Air moving devices, aerodynamic rotor, and methods3 Mar 2026US 12,565,896 B2Whisper Aero Inc.
- Electric compressor10 Feb 2026US 12,546,324 B2Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- Air-moving device with single-part rotor and methods30 Dec 2025US 12,510,089 B2Whisper Aero Inc.
- Inflatable product and built-in air pump assembly19 Aug 2025US 12,392,351 B2Bestway Inflatables & Material Corp.
- Flow path adjustment mechanism and fluid delivery device30 Jul 2026US 2026/0218729 A1Nidec Corporation
- Dual-Chamber Air Pump25 Jun 2026US 2026/0177074 A1
- Blower compressor assembly30 Apr 2026US 2026/0117668 A1ROLLS-ROYCE plc
- Air moving devices, aerodynamic rotor, and methods3 Jul 2025US 2025/0215882 A1Whisper Aero Inc.
- Air-moving device with single-part rotor and methods3 Jul 2025US 2025/0215883 A1Whisper Aero Inc.
Most cited
By later US patents
- Variable-volume exhaust system169US 10,029,289 B2Greenheck Fan Corporation · 2018
- Adjustable speed drive system for centrifugal fan25US 4,158,527 AEcolaire Incorporated · 1979
- Blower system and control system therefor22US 4,011,735 AWestinghouse Electric Corp. · 1977
- Centrifugal fan air control system14US 4,225,289 AEcolaire Incorporated · 1980
- Method of controlling air flow rate of fan11US 4,468,171 AFuji Electric Co., Ltd. · 1984