F04D 29/544
Blade shapes
Official title: {Blade shapes}
F04D29/544 (Blade shapes) appears on 542 US grants and 593 published applications in this corpus.
Search patents in F04D- Granted patents
- 542
- Published applications
- 593
- Assignees
- 194
- Inventors
- 1,035
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 9 | 0 |
| 2001 | 5 | 0 |
| 2002 | 8 | 8 |
| 2003 | 13 | 7 |
| 2004 | 5 | 18 |
| 2005 | 7 | 15 |
| 2006 | 13 | 13 |
| 2007 | 4 | 27 |
| 2008 | 10 | 13 |
| 2009 | 4 | 11 |
| 2010 | 10 | 12 |
| 2011 | 10 | 20 |
| 2012 | 20 | 23 |
| 2013 | 16 | 22 |
| 2014 | 12 | 25 |
| 2015 | 17 | 26 |
| 2016 | 15 | 44 |
| 2017 | 27 | 38 |
| 2018 | 34 | 70 |
| 2019 | 69 | 28 |
| 2020 | 56 | 45 |
| 2021 | 30 | 21 |
| 2022 | 43 | 18 |
| 2023 | 26 | 32 |
| 2024 | 26 | 24 |
| 2025 | 17 | 19 |
| 2026 | 6 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Aircraft engine with stator having varying pitch21 Jul 2026US 12,687,114 B2Pratt & Whitney Canada Corp.
- Forward load reduction structures for aft-most stages of high pressure compressors14 Jul 2026US 12,680,557 B2General Electric Company
- Unducted airfoil assembly5 May 2026US 12,618,329 B2General Electric Company
- Guide vane arrangement for use in a turbine28 Apr 2026US 12,612,927 B2Arianegroup SAS
- Higher work output centrifugal pump stage24 Mar 2026US 12,584,496 B2Halliburton Energy Services.Inc.
- Heat source unit of an air heat pump20 Aug 2026US 2026/0243461 A1Daikin Europe N.V.
- Blading system for axial compressors with axially opposing base merged double triangular prism device blades6 Aug 2026US 2026/0226914 A1Spacerolls Aerospace Technologies Private Limited
- Stator part with blade and fin arrangement in a turbomachine23 Jul 2026US 2026/0210253 A1Safran
- Turbomachine having a flow duct9 Jul 2026US 2026/0193989 A1
- Fan with rotatable blower unit25 Jun 2026US 2026/0177063 A1Guangdong Aoyun Technology Co., Ltd.
Most cited
By later US patents
- Leaned and swept fan outlet guide vanes140US 6,195,983 B1General Electric Company · 2001
- Fan and housing139US 4,548,548 AAirflow Research and Manufacturing Corporation · 1985
- Bowed airfoil for the compression section of a rotary machine108US 5,088,892 AUnited Technologies Corporation · 1992
- Rotary turbomachine having a transonic compressor stage98US 6,017,186 AMTU Motoren- und Turbinen-Union Muenchen GmbH · 2000
- Narrow waist vane83US 6,312,219 B1General Electric Company · 2001