F04D 17/12
Multi-stage pumps
F04D17/12 (Multi-stage pumps) appears on 873 US grants and 1,038 published applications in this corpus.
Search patents in F04D- Granted patents
- 873
- Published applications
- 1,038
- Assignees
- 289
- Inventors
- 1,624
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 4 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 5 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 8 | 0 |
| 2001 | 8 | 1 |
| 2002 | 12 | 8 |
| 2003 | 11 | 8 |
| 2004 | 9 | 11 |
| 2005 | 6 | 7 |
| 2006 | 9 | 5 |
| 2007 | 2 | 22 |
| 2008 | 3 | 8 |
| 2009 | 8 | 33 |
| 2010 | 8 | 28 |
| 2011 | 11 | 28 |
| 2012 | 23 | 35 |
| 2013 | 23 | 34 |
| 2014 | 25 | 46 |
| 2015 | 25 | 88 |
| 2016 | 35 | 74 |
| 2017 | 48 | 66 |
| 2018 | 60 | 75 |
| 2019 | 67 | 64 |
| 2020 | 82 | 61 |
| 2021 | 60 | 64 |
| 2022 | 65 | 56 |
| 2023 | 53 | 75 |
| 2024 | 63 | 51 |
| 2025 | 56 | 55 |
| 2026 | 29 | 35 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electric turbo compressor15 Sep 2026US 12,736,056 B2Kabushiki Kaisha Toyota Jidoshokki
- Compressor with integrated speed multiplier15 Sep 2026US 12,736,057 B2TURBODEN S. p. A.
- Cause-of-anomaly estimation device for fluid machine, cause-of anomaly estimation method therefor, and cause-of-anomaly estimation system for fluid machine15 Sep 2026US 12,736,060 B2Hitachi Industrial Products, Ltd.
- Electric centrifugal compressor8 Sep 2026US 12,729,690 B2Mitsubishi Heavy Industries Engine & Turbocharger, Ltd.
- 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
- 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
- Centrifugal compressor10 Sep 2026US 2026/0266311 A1Daikin Industries, Ltd.
- Compressor system for heating, ventilation, air conditioning & refrigeration system3 Sep 2026US 2026/0258981 A1Tyco Fire & Security GmbH
- Multistage Centrifugal Compressor27 Aug 2026US 2026/0251146 A1Hitachi Industrial Products, Ltd.
- Compressor system and bundle movement method20 Aug 2026US 2026/0243275 A1Mitsubishi Heavy Industries Compressor Corporation
Most cited
By later US patents
- Compact low noise efficient blower for CPAP devices351US 7,866,944 B2ResMed Motor Technologies Inc. · 2011
- Double-ended blower and volutes therefor139US 6,910,483 B2ResMed Limited · 2005
- Motor-driven centrifugal air compressor with axial airflow115US 6,129,524 ATurbodyne Systems, Inc. · 2000
- Fluid rotary machine99US 4,105,372 AHitachi, Ltd. · 1978
- Portable air-blowing working machine66US 6,109,865 AKioritz Corporation · 2000