F04D 29/388
Characterised by construction
Official title: {characterised by construction}
F04D29/388 (Characterised by construction) appears on 502 US grants and 579 published applications in this corpus.
Search patents in F04D- Granted patents
- 502
- Published applications
- 579
- Assignees
- 212
- Inventors
- 1,087
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 8 | 0 |
| 2001 | 9 | 1 |
| 2002 | 5 | 1 |
| 2003 | 0 | 5 |
| 2004 | 3 | 9 |
| 2005 | 2 | 11 |
| 2006 | 11 | 13 |
| 2007 | 8 | 15 |
| 2008 | 4 | 14 |
| 2009 | 5 | 9 |
| 2010 | 4 | 11 |
| 2011 | 12 | 17 |
| 2012 | 8 | 16 |
| 2013 | 4 | 16 |
| 2014 | 14 | 21 |
| 2015 | 10 | 16 |
| 2016 | 17 | 43 |
| 2017 | 17 | 48 |
| 2018 | 27 | 63 |
| 2019 | 49 | 54 |
| 2020 | 70 | 46 |
| 2021 | 32 | 31 |
| 2022 | 49 | 28 |
| 2023 | 28 | 26 |
| 2024 | 29 | 21 |
| 2025 | 19 | 24 |
| 2026 | 12 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fan component, fan, fan unit, air conditioner, heat pump device, and method for manufacturing fan component9 Jun 2026US 12,650,133 B2Daikin Industries, Ltd.
- Light transmission fan blade and ceiling fan2 Jun 2026US 12,644,593 B1Fanxion LLC
- Axial-flow heat-dissipation fan19 May 2026US 12,631,188 B2Acer Incorporated
- Trunnions having multiple fan blades for use with an aircraft engine5 May 2026US 12,618,416 B1
- Efficient fan assembly7 Apr 2026US 12,595,806 B2Greenheck Fan Corporation
- Rotor assembly with interchangeable blades24 Sep 2026US 2026/0286972 A1Rescue South, Inc.
- A method of forming an airfoil assembly having a composite spar10 Sep 2026US 2026/0264840 A1General Electric Company
- Airfoil with leading edge protector for a fan assembly10 Sep 2026US 2026/0266310 A1General Electric Company
- Axial flow fan20 Aug 2026US 2026/0243263 A1Usui Co., Ltd.
- Magnetic levitation propeller type of a gas injector and a photoresist removing processing chamber with the same20 Aug 2026US 2026/0243265 A1VM Inc.
Most cited
By later US patents
- Stitched composite fan blade98US 6,431,837 B12002
- Propeller breeze enhancing blades for conventional ceiling fans70US 4,892,460 A1990
- Fan blade reinforcement using bonded hollow spheres68US 5,230,850 A1993
- Method and apparatus for reducing stress on the tips of turbine or compressor blades66US 5,476,363 APratt & Whitney · 1995
- Axial flow fan and fan blade62US 6,250,886 B1Chittom International, Inc. · 2001