F04D 29/321
For axial flow compressors
Official title: {for axial flow compressors}
F04D29/321 (For axial flow compressors) appears on 2,101 US grants and 2,359 published applications in this corpus.
Search patents in F04D- Granted patents
- 2,101
- Published applications
- 2,359
- Assignees
- 278
- Inventors
- 3,506
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 7 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 7 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 7 | 0 |
| 1992 | 9 | 0 |
| 1993 | 10 | 0 |
| 1994 | 12 | 0 |
| 1995 | 11 | 0 |
| 1996 | 9 | 0 |
| 1997 | 10 | 0 |
| 1998 | 11 | 0 |
| 1999 | 9 | 0 |
| 2000 | 13 | 0 |
| 2001 | 13 | 5 |
| 2002 | 17 | 5 |
| 2003 | 13 | 14 |
| 2004 | 11 | 25 |
| 2005 | 14 | 44 |
| 2006 | 26 | 19 |
| 2007 | 19 | 33 |
| 2008 | 21 | 71 |
| 2009 | 49 | 52 |
| 2010 | 31 | 63 |
| 2011 | 27 | 69 |
| 2012 | 57 | 90 |
| 2013 | 59 | 95 |
| 2014 | 77 | 96 |
| 2015 | 59 | 97 |
| 2016 | 82 | 322 |
| 2017 | 105 | 285 |
| 2018 | 171 | 224 |
| 2019 | 301 | 138 |
| 2020 | 243 | 175 |
| 2021 | 142 | 89 |
| 2022 | 147 | 69 |
| 2023 | 80 | 78 |
| 2024 | 87 | 95 |
| 2025 | 71 | 52 |
| 2026 | 34 | 54 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Extraction impeller for axial compressor6 Oct 2026US 12,753,769 B2GE Vernova Infrastructure Technology LLC
- Flexible support structure for a geared architecture gas turbine engine29 Sep 2026US 12,747,675 B2Rtx Corporation
- Gas turbine engine with acoustic spacing of the fan blades and outlet guide vanes29 Sep 2026US 12,747,735 B2General Electric Company
- Rotor disk, turbine blade, and turbine blade assembly equipped with these1 Sep 2026US 12,723,516 B2Mitsubishi Heavy Industries, Ltd.
- Axial compressor integrated bladed rotor airfoil design scheme18 Aug 2026US 12,709,986 B1Pratt & Whitney Canada Corp.
- Turbofan engine including a fan actuation system10 Sep 2026US 2026/0266307 A1General Electric Company
- Turbofan engine including a fan actuation system27 Aug 2026US 2026/0251152 A1General Electric Company
- Propeller blade and method for repairing a propeller blade20 Aug 2026US 2026/0242053 A1RöDer PräZision GmbH
- Airfoil assembly13 Aug 2026US 2026/0235037 A1GE Aviation Systems LLC
- Asynchronous airfoil pitch adjustment for aircraft propulsion system6 Aug 2026US 2026/0226837 A1Rtx Corporation
Most cited
By later US patents
- Wide chord fan blade334US 5,141,400 AGeneral Electric Company · 1992
- Forward swept rotor blade138US 5,167,489 AGeneral Electric Company · 1992
- Swept fan blade127US 6,071,077 AROLLS-ROYCE plc · 2000
- Compressor rotor cooling system for a gas turbine125US 5,685,158 AGeneral Electric Company · 1997
- Nanocomposite layered airfoil114US 6,341,747 B12002