F04D 29/384
Characterised by form
Official title: {characterised by form}
F04D29/384 (Characterised by form) appears on 875 US grants and 982 published applications in this corpus.
Search patents in F04D- Granted patents
- 875
- Published applications
- 982
- Assignees
- 370
- Inventors
- 1,673
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 4 | 0 |
| 1989 | 3 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 2 | 0 |
| 1993 | 9 | 0 |
| 1994 | 5 | 0 |
| 1995 | 5 | 0 |
| 1996 | 6 | 0 |
| 1997 | 7 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 16 | 0 |
| 2001 | 18 | 1 |
| 2002 | 16 | 11 |
| 2003 | 17 | 24 |
| 2004 | 21 | 29 |
| 2005 | 15 | 18 |
| 2006 | 14 | 19 |
| 2007 | 6 | 29 |
| 2008 | 12 | 28 |
| 2009 | 12 | 13 |
| 2010 | 8 | 22 |
| 2011 | 16 | 18 |
| 2012 | 21 | 23 |
| 2013 | 14 | 27 |
| 2014 | 16 | 33 |
| 2015 | 18 | 40 |
| 2016 | 24 | 38 |
| 2017 | 28 | 51 |
| 2018 | 45 | 83 |
| 2019 | 68 | 57 |
| 2020 | 74 | 80 |
| 2021 | 54 | 58 |
| 2022 | 86 | 52 |
| 2023 | 56 | 61 |
| 2024 | 48 | 50 |
| 2025 | 34 | 53 |
| 2026 | 32 | 64 |
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
- Turbomachine and method of assembly28 Jul 2026US 12,692,874 B2General Electric Company
- 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.
- Axial flow fan20 Aug 2026US 2026/0243263 A1Usui Co., Ltd.
Most cited
By later US patents
- Enhanced performance fan with the use of winglets282US 6,517,315 B2Hewlett-Packard Company · 2003
- Winglet-enhanced fan164US 6,776,578 B2Hewlett-Packard Development Company, L. P. · 2004
- High efficiency ceiling fan141US 6,039,541 AUniversity of Central Florida · 2000
- Blade for axial fan133US 5,437,541 A1995
- Recirculation barrier for a heat transfer system126US 4,173,995 AInternational Harvester Company · 1979