F04D 29/38
Blades
Official title: Blades {(for axial flow compressors F04D29/324)}
F04D29/38 (Blades) appears on 1,510 US grants and 1,688 published applications in this corpus.
Search patents in F04D- Granted patents
- 1,510
- Published applications
- 1,688
- Assignees
- 540
- Inventors
- 2,861
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 6 | 0 |
| 1979 | 8 | 0 |
| 1980 | 6 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 4 | 0 |
| 1987 | 8 | 0 |
| 1988 | 7 | 0 |
| 1989 | 9 | 0 |
| 1990 | 8 | 0 |
| 1991 | 7 | 0 |
| 1992 | 9 | 0 |
| 1993 | 13 | 0 |
| 1994 | 12 | 0 |
| 1995 | 9 | 0 |
| 1996 | 9 | 0 |
| 1997 | 15 | 0 |
| 1998 | 9 | 0 |
| 1999 | 9 | 0 |
| 2000 | 27 | 0 |
| 2001 | 27 | 2 |
| 2002 | 22 | 16 |
| 2003 | 18 | 33 |
| 2004 | 30 | 44 |
| 2005 | 19 | 32 |
| 2006 | 29 | 35 |
| 2007 | 14 | 51 |
| 2008 | 19 | 48 |
| 2009 | 19 | 29 |
| 2010 | 11 | 40 |
| 2011 | 30 | 39 |
| 2012 | 34 | 39 |
| 2013 | 22 | 52 |
| 2014 | 37 | 56 |
| 2015 | 30 | 65 |
| 2016 | 49 | 103 |
| 2017 | 56 | 130 |
| 2018 | 79 | 154 |
| 2019 | 138 | 116 |
| 2020 | 154 | 136 |
| 2021 | 93 | 84 |
| 2022 | 132 | 82 |
| 2023 | 78 | 81 |
| 2024 | 82 | 70 |
| 2025 | 55 | 70 |
| 2026 | 39 | 81 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fan6 Oct 2026US 12,753,768 B2Levitronix LLC
- Axial fan assembly including an intermediate shroud6 Oct 2026US 12,753,773 B2Regal Beloit America, Inc.
- 4D printed fan with optimized cooling29 Sep 2026US 12,747,736 B2International Business Machines Corporation
- Impeller22 Sep 2026US 12,742,457 B2Carrier Japan Corporation
- Superhydrophobic blade of Carex tristachya type1 Sep 2026US 12,723,594 B1Jiangsu University
- Evaporator for ambient water bodies, and related system and method8 Oct 2026US 2026/0306964 A1Resource West, Inc.
- Performance of airfoils and hydrofoils8 Oct 2026US 2026/0307777 A1SJK Energy Solutions, LLC
- Variable-pitch vane for an unducted aeronautical thruster1 Oct 2026US 2026/0298260 A1Safran Aircraft Engines
- Axial fan comprising endplates at the tip of the blades24 Sep 2026US 2026/0286965 A1R.E.M. Patents S.R.L.
- Rotor assembly with interchangeable blades24 Sep 2026US 2026/0286972 A1Rescue South, Inc.
Most cited
By later US patents
- Expandable impeller pump391US 7,393,181 B2Datascope Investment Corp. · 2008
- Expandable impeller pump296US 7,927,068 B2The Penn State Research Foundation · 2011
- Enhanced performance fan with the use of winglets282US 6,517,315 B2Hewlett-Packard Company · 2003
- Fan with collapsible blades, redundant fan system, and related method271US 6,860,713 B2Nidec Corporation · 2005
- Article comprising an impeller246US 8,079,948 B2NuCardia, Inc. · 2011