F04D 19/007
Multistage fans
Official title: {multistage fans}
F04D19/007 (Multistage fans) appears on 247 US grants and 345 published applications in this corpus.
Search patents in F04D- Granted patents
- 247
- Published applications
- 345
- Assignees
- 137
- Inventors
- 536
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 3 |
| 2003 | 7 | 8 |
| 2004 | 4 | 8 |
| 2005 | 3 | 6 |
| 2006 | 7 | 7 |
| 2007 | 4 | 20 |
| 2008 | 2 | 22 |
| 2009 | 6 | 18 |
| 2010 | 8 | 9 |
| 2011 | 14 | 9 |
| 2012 | 14 | 9 |
| 2013 | 7 | 13 |
| 2014 | 9 | 13 |
| 2015 | 9 | 19 |
| 2016 | 9 | 15 |
| 2017 | 12 | 12 |
| 2018 | 10 | 21 |
| 2019 | 14 | 18 |
| 2020 | 16 | 22 |
| 2021 | 14 | 20 |
| 2022 | 34 | 20 |
| 2023 | 13 | 15 |
| 2024 | 15 | 12 |
| 2025 | 9 | 15 |
| 2026 | 4 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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.
- Configurable bi-directional airflow fan21 Apr 2026US 12,607,203 B2Cisco Technology, Inc.
- Counter-rotating fan assembly17 Mar 2026US 12,577,955 B2Robert Bosch GmbH
- Fan frame, fan module, and electronic device3 Mar 2026US 12,565,901 B1Wistron Neweb Corp.
- Axial fan25 Nov 2025US 12,480,505 B2Sanyo Denki Co., Ltd.
- Stacked fan structure, combined blade-integrated fan and automotive seat ventilation system13 Aug 2026US 2026/0235132 A1Aew Technology Group Co., Ltd.
- Modular cooling fan assembly9 Jul 2026US 2026/0194062 A1Purple Cloud Development Pte. Ltd.
- Cooling fan assembly9 Jul 2026US 2026/0194074 A1Purple Cloud Development Pte. Ltd.
- A fan system and a method of optimizing efficiency in a fan system9 Jul 2026US 2026/0196938 A1Zerro Power Systems Pte Ltd
- Rotating device25 Jun 2026US 2026/0177061 A1MINEBEA MITSUMI Inc.
Most cited
By later US patents
- Fan with collapsible blades, redundant fan system, and related method271US 6,860,713 B2Nidec Corporation · 2005
- Counterrotating axial blower47US 7,156,611 B2Sanyo Denki Co., Ltd. · 2007
- Aircraft engine with separate auxiliary rotor and fan rotor44US 7,765,786 B2MTU Aero Engines AG · 2010
- Fan assembly and method42US 6,537,019 B1Intel Corporation · 2003
- Heat-dissipating module38US 7,031,157 B2Sunonwealth Electric Machine Industry Co., Ltd. · 2006