F04D 29/444
Bladed diffusers
Official title: {Bladed diffusers}
F04D29/444 (Bladed diffusers) appears on 689 US grants and 792 published applications in this corpus.
Search patents in F04D- Granted patents
- 689
- Published applications
- 792
- Assignees
- 309
- Inventors
- 1,524
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 4 | 0 |
| 1989 | 10 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 7 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 3 | 0 |
| 2000 | 7 | 0 |
| 2001 | 8 | 3 |
| 2002 | 7 | 5 |
| 2003 | 12 | 7 |
| 2004 | 8 | 14 |
| 2005 | 2 | 16 |
| 2006 | 8 | 9 |
| 2007 | 6 | 14 |
| 2008 | 8 | 16 |
| 2009 | 8 | 9 |
| 2010 | 7 | 24 |
| 2011 | 10 | 17 |
| 2012 | 18 | 20 |
| 2013 | 20 | 21 |
| 2014 | 14 | 38 |
| 2015 | 14 | 30 |
| 2016 | 12 | 49 |
| 2017 | 36 | 53 |
| 2018 | 32 | 64 |
| 2019 | 48 | 53 |
| 2020 | 64 | 63 |
| 2021 | 55 | 51 |
| 2022 | 52 | 43 |
| 2023 | 40 | 56 |
| 2024 | 47 | 54 |
| 2025 | 44 | 31 |
| 2026 | 12 | 32 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Centrifugal compressor14 Jul 2026US 12,680,555 B2IHI Corporation
- Combustor scroll de-swirler23 Jun 2026US 12,662,944 B1Pratt & Whitney Canada Corp.
- Hybrid manufacture of an impeller23 Jun 2026US 12,663,018 B2KSB SE & Co. KGaA
- Fan motor having a vane structure for cooling efficiency16 Jun 2026US 12,658,763 B2LG Electronics Inc.
- Composite cross-over diffuser for a centrifugal pump, centrifugal pump comprising the same and corresponding manufacturing process9 Jun 2026US 12,650,131 B2Waterax Inc.
- Fan motor8 Oct 2026US 2026/0309164 A1LG Electronics Inc.
- Multistage Centrifugal Compressor27 Aug 2026US 2026/0251146 A1Hitachi Industrial Products, Ltd.
- Neck fan20 Aug 2026US 2026/0243273 A1Shenzhen Jisu Technology Co., Ltd
- Stacked fan structure, combined blade-integrated fan and automotive seat ventilation system13 Aug 2026US 2026/0235132 A1Aew Technology Group Co., Ltd.
- Motor and a centrifugal fan thereof30 Jul 2026US 2026/0218712 A1
Most cited
By later US patents
- Compact low noise efficient blower for CPAP devices351US 7,866,944 B2ResMed Motor Technologies Inc. · 2011
- Air guide assembly for an electric motor and methods of making147US 5,296,769 AAB Electrolux · 1994
- Cooler and display device having the same113US 8,254,121 B2Samsung Electronics Co., Ltd. · 2012
- Multi-directional air circulating fan108US 7,059,826 B2Lasko Holdings, Inc. · 2006
- Electric blower having improved return passage for discharged air flow97US 5,110,266 AHitachi, Ltd. · 1992