F03B 3/04
Machines or engines of reaction type: with substantially axial flow throughout rotors
Official title: with substantially axial flow throughout rotors, e.g. propeller turbines {(rotors per se F03B3/126)}
F03B3/04 (Machines or engines of reaction type: with substantially axial flow throughout rotors) appears on 179 US grants and 217 published applications in this corpus.
Search patents in F03B- Granted patents
- 179
- Published applications
- 217
- Assignees
- 124
- Inventors
- 393
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 7 | 5 |
| 2003 | 5 | 0 |
| 2004 | 1 | 6 |
| 2005 | 3 | 2 |
| 2006 | 3 | 1 |
| 2007 | 1 | 5 |
| 2008 | 1 | 3 |
| 2009 | 3 | 5 |
| 2010 | 3 | 13 |
| 2011 | 2 | 9 |
| 2012 | 2 | 4 |
| 2013 | 9 | 11 |
| 2014 | 6 | 12 |
| 2015 | 3 | 15 |
| 2016 | 4 | 13 |
| 2017 | 13 | 12 |
| 2018 | 5 | 26 |
| 2019 | 23 | 13 |
| 2020 | 12 | 10 |
| 2021 | 15 | 10 |
| 2022 | 8 | 11 |
| 2023 | 10 | 7 |
| 2024 | 10 | 10 |
| 2025 | 10 | 5 |
| 2026 | 2 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hydraulic turbine29 Sep 2026US 12,747,716 B2Natel Energy Holdings, Inc.
- Hydropower turbine26 May 2026US 12,637,996 B1Mesa Associates, Inc.
- Energy-recovery turbine with pressure-release valve18 Nov 2025US 12,473,883 B2Corporation Bearstream Inc.
- Systems and methods for producing hydrogen gas from a water distribution system28 Oct 2025US 12,454,761 B1
- Water transportation pipe power generation device with flow-regulating and pressure-regulating function30 Sep 2025US 12,429,022 B2Ningbo University
- Hydroelectric power generation device and power generation method based on axial-flow hydraulic turbine1 Oct 2026US 2026/0298190 A1Hebei Water Conservancy Engr Bureau Group Limited
- Power generation apparatus13 Aug 2026US 2026/0235099 A14Rivers Power Engineering PTY Ltd
- Self-Cleaning Stator for Water Turbine7 May 2026US 2026/0126026 A1Cadens, LLC
- Fluid-powered water quality system16 Apr 2026US 2026/0103406 A1
- Wind Turbine9 Apr 2026US 2026/0098515 A1Enturi Limited
Most cited
By later US patents
- Portable water-powered electric generator100US 4,868,408 A1989
- Portable hydroelectric power unit46US 4,816,697 A1989
- Plastic hydraulic turbine40US 5,040,945 A1991
- Dual type multiple stage, hydraulic turbine power generator including reaction type turbine with adjustable blades40US 6,441,508 B1Ebara International Corporation · 2002
- Hydrogen production from hydro power39US 6,841,893 B2Voith Siemens Hydro Power Generation, Inc. · 2005