F04D 29/26
Rotors specially for elastic fluids
F04D29/26 (Rotors specially for elastic fluids) appears on 7,090 US grants and 7,968 published applications in this corpus.
Search patents in F04D- Granted patents
- 7,090
- Published applications
- 7,968
- Assignees
- 1,827
- Inventors
- 12,189
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 29 | 0 |
| 1977 | 37 | 0 |
| 1978 | 26 | 0 |
| 1979 | 29 | 0 |
| 1980 | 35 | 0 |
| 1981 | 19 | 0 |
| 1982 | 23 | 0 |
| 1983 | 12 | 0 |
| 1984 | 15 | 0 |
| 1985 | 20 | 0 |
| 1986 | 24 | 0 |
| 1987 | 33 | 0 |
| 1988 | 28 | 0 |
| 1989 | 32 | 0 |
| 1990 | 36 | 0 |
| 1991 | 33 | 0 |
| 1992 | 41 | 0 |
| 1993 | 50 | 0 |
| 1994 | 40 | 0 |
| 1995 | 43 | 0 |
| 1996 | 40 | 0 |
| 1997 | 50 | 0 |
| 1998 | 46 | 0 |
| 1999 | 57 | 0 |
| 2000 | 101 | 0 |
| 2001 | 87 | 17 |
| 2002 | 107 | 88 |
| 2003 | 102 | 116 |
| 2004 | 92 | 157 |
| 2005 | 85 | 176 |
| 2006 | 122 | 161 |
| 2007 | 87 | 171 |
| 2008 | 82 | 202 |
| 2009 | 101 | 188 |
| 2010 | 90 | 186 |
| 2011 | 111 | 199 |
| 2012 | 170 | 250 |
| 2013 | 121 | 254 |
| 2014 | 180 | 274 |
| 2015 | 185 | 417 |
| 2016 | 207 | 697 |
| 2017 | 300 | 773 |
| 2018 | 472 | 632 |
| 2019 | 732 | 522 |
| 2020 | 638 | 498 |
| 2021 | 451 | 404 |
| 2022 | 498 | 351 |
| 2023 | 341 | 342 |
| 2024 | 373 | 338 |
| 2025 | 295 | 277 |
| 2026 | 162 | 278 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Aircraft with an unducted fan propulsor6 Oct 2026US 12,752,923 B2General Electric Company
- Fan6 Oct 2026US 12,753,768 B2Levitronix LLC
- Extraction impeller for axial compressor6 Oct 2026US 12,753,769 B2GE Vernova Infrastructure Technology LLC
- Impeller and centrifugal compressor6 Oct 2026US 12,753,772 B2Mitsubishi Heavy Industries Compressor Corporation
- Axial fan assembly including an intermediate shroud6 Oct 2026US 12,753,773 B2Regal Beloit America, Inc.
- 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
- Impeller with converging inducer8 Oct 2026US 2026/0309161 A1Pratt & Whitney Canada Corp.
- Turbofan engine including a fan actuation system8 Oct 2026US 2026/0309162 A1General Electric Company
- Rotor for a turbomachine, turbomachine, and method for balancing a rotor of a turbomachine1 Oct 2026US 2026/0298094 A1Accelleron Switzerland Ltd.
Most cited
By later US patents
- Expandable impeller pump391US 7,393,181 B2Datascope Investment Corp. · 2008
- Compact low noise efficient blower for CPAP devices351US 7,866,944 B2ResMed Motor Technologies Inc. · 2011
- Wide chord fan blade334US 5,141,400 AGeneral Electric Company · 1992
- Dual-pressure blower for positive air pressure device333US 6,349,724 B1Compumedics Sleep Pty Ltd · 2002
- Expandable impeller pump296US 7,927,068 B2The Penn State Research Foundation · 2011