F04D 25/14
And having shutters
Official title: and having shutters, e.g. automatically closed when not in use
F04D25/14 (And having shutters) appears on 142 US grants and 162 published applications in this corpus.
Search patents in F04D- Granted patents
- 142
- Published applications
- 162
- Assignees
- 101
- Inventors
- 343
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 2 |
| 2002 | 4 | 0 |
| 2003 | 2 | 2 |
| 2004 | 2 | 2 |
| 2005 | 2 | 4 |
| 2006 | 3 | 4 |
| 2007 | 2 | 4 |
| 2008 | 2 | 9 |
| 2009 | 0 | 3 |
| 2010 | 1 | 2 |
| 2011 | 5 | 3 |
| 2012 | 1 | 7 |
| 2013 | 4 | 7 |
| 2014 | 6 | 11 |
| 2015 | 5 | 9 |
| 2016 | 4 | 12 |
| 2017 | 5 | 9 |
| 2018 | 9 | 8 |
| 2019 | 8 | 10 |
| 2020 | 10 | 8 |
| 2021 | 7 | 15 |
| 2022 | 10 | 3 |
| 2023 | 12 | 12 |
| 2024 | 6 | 5 |
| 2025 | 7 | 5 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ventilation and protection grid for fan module16 Jun 2026US 12,655,855 B2Schneider Electric It Corporation
- Fan module and electronic device28 Apr 2026US 12,612,920 B2Nanning FuLian FuGui Precision Industrial Co., Ltd.
- Fan drip-proof structure24 Mar 2026US 12,584,497 B2TMEIC Corporation
- Heat recovery unit30 Dec 2025US 12,510,264 B2Zehnder Group International AG
- Blower28 Oct 2025US 12,455,096 B2LG Electronics Inc.
- Motor and a centrifugal fan thereof30 Jul 2026US 2026/0218712 A1
- Aircraft and a power unit thereof30 Jul 2026US 2026/0218725 A1
- Flow path adjustment mechanism and fluid delivery device30 Jul 2026US 2026/0218729 A1Nidec Corporation
- Fan Assembly11 Jun 2026US 2026/0160271 A1
- Fan cover and a method of diverting output air using fan cover30 Apr 2026US 2026/0117795 A1Vertiv Corporation
Most cited
By later US patents
- Airflow flapper valve197US 6,705,833 B2Hewlett-Packard Development Company, L. P. · 2004
- Back flow limiting device for failed redundant parallel fan166US 6,031,717 ADell USA, L. P. · 2000
- Device and method for gas turbine unlocking112US 9,845,730 B2Nuovo Pignone S.p.A. · 2017
- Protective shutter assembly for a forced air cooling system92US 6,042,348 ALucent Technologies Inc. · 2000
- Ventilation fan62US 6,386,828 B1Aerotech, Inc. · 2002