F04D 25/16
Combinations of two or more pumps
Official title: Combinations of two or more pumps {; Producing two or more separate gas flows}
F04D25/16 (Combinations of two or more pumps) appears on 1,153 US grants and 1,426 published applications in this corpus.
Search patents in F04D- Granted patents
- 1,153
- Published applications
- 1,426
- Assignees
- 651
- Inventors
- 2,731
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 4 | 0 |
| 1991 | 6 | 0 |
| 1992 | 6 | 0 |
| 1993 | 4 | 0 |
| 1994 | 5 | 0 |
| 1995 | 10 | 0 |
| 1996 | 9 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 13 | 0 |
| 2000 | 11 | 0 |
| 2001 | 13 | 6 |
| 2002 | 29 | 12 |
| 2003 | 20 | 29 |
| 2004 | 21 | 36 |
| 2005 | 15 | 41 |
| 2006 | 20 | 31 |
| 2007 | 23 | 35 |
| 2008 | 12 | 40 |
| 2009 | 19 | 39 |
| 2010 | 24 | 25 |
| 2011 | 23 | 31 |
| 2012 | 31 | 55 |
| 2013 | 27 | 48 |
| 2014 | 36 | 58 |
| 2015 | 28 | 50 |
| 2016 | 28 | 77 |
| 2017 | 47 | 75 |
| 2018 | 47 | 81 |
| 2019 | 73 | 76 |
| 2020 | 76 | 87 |
| 2021 | 60 | 81 |
| 2022 | 84 | 87 |
| 2023 | 79 | 82 |
| 2024 | 76 | 84 |
| 2025 | 88 | 102 |
| 2026 | 46 | 58 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Inflating module for use with an inflatable object6 Oct 2026US RE51,054 E1Team Worldwide Corporation
- Compressor29 Sep 2026US 12,747,734 B2Mitsubishi Heavy Industries Compressor Corporation
- Motor assembly for an appliance such as a vacuum cleaner and a vacuum cleaner having same15 Sep 2026US 12,736,058 B2Omachron Intellectual Property Inc.
- Fan unit1 Sep 2026US 12,723,600 B2Nidec Corporation
- Hydrogen compressing assembly, hydrogen production plant, and compressing method25 Aug 2026US 12,716,419 B2Nuovo Pignone Tecnologie Srl
- Vacuum cleaner with two turbines, and operating method for same8 Oct 2026US 2026/0305892 A1Hilti Aktiengesellschaft
- Neck fan20 Aug 2026US 2026/0243273 A1Shenzhen Jisu Technology Co., Ltd
- Method for assembling compressor module and compressor module20 Aug 2026US 2026/0243276 A1Mitsubishi Heavy Industries Compressor Corporation
- Stacked fan structure, combined blade-integrated fan and automotive seat ventilation system13 Aug 2026US 2026/0235132 A1Aew Technology Group Co., Ltd.
- Compressor13 Aug 2026US 2026/0235136 A1Mitsubishi Heavy Industries Compressor Corporation
Most cited
By later US patents
- Dual-pressure blower for positive air pressure device333US 6,349,724 B1Compumedics Sleep Pty Ltd · 2002
- Thermoelectric heat exchanger227US 6,119,463 AAmerigon Incorporated · 2000
- Apparatus and method for regulating a pressure in a chamber203US 5,944,049 AAPPLIED Materials.Inc. · 1999
- Thermoelectric heat exchanger196US 6,223,539 B1Amerigon Incorporated · 2001
- Back flow limiting device for failed redundant parallel fan166US 6,031,717 ADell USA, L. P. · 2000