F04D 19/02
Multi-stage pumps
F04D19/02 (Multi-stage pumps) appears on 1,470 US grants and 1,559 published applications in this corpus.
Search patents in F04D- Granted patents
- 1,470
- Published applications
- 1,559
- Assignees
- 435
- Inventors
- 2,416
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 5 | 0 |
| 1978 | 6 | 0 |
| 1979 | 4 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 4 | 0 |
| 1987 | 7 | 0 |
| 1988 | 11 | 0 |
| 1989 | 12 | 0 |
| 1990 | 10 | 0 |
| 1991 | 12 | 0 |
| 1992 | 14 | 0 |
| 1993 | 9 | 0 |
| 1994 | 14 | 0 |
| 1995 | 15 | 0 |
| 1996 | 19 | 0 |
| 1997 | 14 | 0 |
| 1998 | 13 | 0 |
| 1999 | 16 | 0 |
| 2000 | 20 | 0 |
| 2001 | 26 | 12 |
| 2002 | 40 | 30 |
| 2003 | 35 | 47 |
| 2004 | 33 | 26 |
| 2005 | 28 | 48 |
| 2006 | 25 | 39 |
| 2007 | 15 | 41 |
| 2008 | 24 | 50 |
| 2009 | 15 | 43 |
| 2010 | 29 | 48 |
| 2011 | 26 | 47 |
| 2012 | 37 | 33 |
| 2013 | 25 | 54 |
| 2014 | 39 | 71 |
| 2015 | 34 | 78 |
| 2016 | 47 | 71 |
| 2017 | 65 | 111 |
| 2018 | 65 | 94 |
| 2019 | 85 | 86 |
| 2020 | 96 | 94 |
| 2021 | 81 | 75 |
| 2022 | 108 | 110 |
| 2023 | 76 | 81 |
| 2024 | 99 | 77 |
| 2025 | 62 | 58 |
| 2026 | 29 | 35 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Flexible support structure for a geared architecture gas turbine engine29 Sep 2026US 12,747,675 B2Rtx Corporation
- Shut-off valve, vacuum pump system, and vacuum pump29 Sep 2026US 12,747,793 B2Shimadzu Corporation
- Compressor shroud with swept grooves22 Sep 2026US 12,742,459 B2Pratt & Whitney Canada Corp.
- Blower15 Sep 2026US 12,736,063 B2Nidec Corporation
- Hermetic electrical feedthrough15 Sep 2026US 12,738,398 B2KYOCERA Corporation
- Vacuum pump and stator disc24 Sep 2026US 2026/0286966 A1Edwards Japan Limited
- A vacuum pump and a permanent magnetic bearing assembly for a vacuum pump24 Sep 2026US 2026/0286969 A1
- Magnetic assembly and vacuum pump17 Sep 2026US 2026/0275991 A1Leybold Aktiengesellschaft
- Method for controlling the operating parameters of a turbomolecular vacuum pump17 Sep 2026US 2026/0275993 A1Pfeiffer Vacuum GmbH
- Vacuum pump, control device, and warmup time control method10 Sep 2026US 2026/0266297 A1Edwards Japan Limited
Most cited
By later US patents
- Expandable impeller pump391US 7,393,181 B2Datascope Investment Corp. · 2008
- Expandable impeller pump296US 7,927,068 B2The Penn State Research Foundation · 2011
- Counter rotating aircraft gas turbine engine with high overall pressure ratio compressor248US 6,732,502 B2General Electric Company · 2004
- Apparatus and method for regulating a pressure in a chamber203US 5,944,049 AAPPLIED Materials.Inc. · 1999
- Expandable impeller pump197US 8,376,707 B2The Penn State Research Foundation · 2013