F04D 29/284
For compressors
Official title: {for compressors}
F04D29/284 (For compressors) appears on 952 US grants and 1,173 published applications in this corpus.
Search patents in F04D- Granted patents
- 952
- Published applications
- 1,173
- Assignees
- 351
- Inventors
- 2,105
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 7 | 0 |
| 1998 | 7 | 0 |
| 1999 | 4 | 0 |
| 2000 | 10 | 0 |
| 2001 | 6 | 0 |
| 2002 | 10 | 6 |
| 2003 | 7 | 5 |
| 2004 | 6 | 10 |
| 2005 | 6 | 17 |
| 2006 | 8 | 18 |
| 2007 | 7 | 19 |
| 2008 | 7 | 15 |
| 2009 | 8 | 17 |
| 2010 | 11 | 31 |
| 2011 | 10 | 29 |
| 2012 | 22 | 29 |
| 2013 | 16 | 28 |
| 2014 | 21 | 31 |
| 2015 | 25 | 71 |
| 2016 | 21 | 111 |
| 2017 | 35 | 132 |
| 2018 | 78 | 99 |
| 2019 | 104 | 82 |
| 2020 | 107 | 79 |
| 2021 | 91 | 71 |
| 2022 | 74 | 62 |
| 2023 | 60 | 69 |
| 2024 | 63 | 50 |
| 2025 | 43 | 50 |
| 2026 | 29 | 42 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Impeller and centrifugal compressor6 Oct 2026US 12,753,772 B2Mitsubishi Heavy Industries Compressor Corporation
- Motor rotor with inner sleeve15 Sep 2026US 12,738,785 B2
- Turbo compressor8 Sep 2026US 12,729,691 B2LG Electronics Inc.
- Method for machining ribs or grooves for air or gas bearings of a rotary-shaft-comprising workpiece of a compressor, and method for assembling the components of the workpiece1 Sep 2026US 12,723,595 B2The Swatch Group Research and Development Ltd
- Aircraft gas turbine engine impeller with a trailing edge that is non-linear or angled or irregularly-shaped25 Aug 2026US 12,716,424 B2Pratt & Whitney Canada Corp.
- Impeller with converging inducer8 Oct 2026US 2026/0309161 A1Pratt & Whitney Canada Corp.
- Rotor for a turbomachine, turbomachine, and method for balancing a rotor of a turbomachine1 Oct 2026US 2026/0298094 A1Accelleron Switzerland Ltd.
- Turbine wheel for a radial turbine1 Oct 2026US 2026/0298257 A1Daimler Truck AG
- Two-stage radial compressor with compensating bodies for compensating a change in length occurring upon a change in temperature1 Oct 2026US 2026/0298261 A1ebm-papst Mulfingen GmbH & Co. KGaA & Co. KG
- Compressor wheel and centrifugal compressor24 Sep 2026US 2026/0286971 A1Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
Most cited
By later US patents
- Dual-pressure blower for positive air pressure device333US 6,349,724 B1Compumedics Sleep Pty Ltd · 2002
- Gas delivery means for respirators and anesthesia apparatus81US 5,875,783 ADragerwerk Aktiengesellschaft · 1999
- Turbocharger integrated bearing system81US 6,017,184 AAllied-Signal Inc. · 2000
- Isothermal compression79US 4,478,553 AMechanical Technology Incorporated · 1984
- Gas separation with split stream centrifugal turbomachinery76US 6,398,853 B1Quest Air Gases Inc. · 2002