F15D 1/0025
Using passive means, i.e. without external energy supply
Official title: {using passive means, i.e. without external energy supply}
F15D1/0025 (Using passive means, i.e. without external energy supply) appears on 219 US grants and 288 published applications in this corpus.
Search patents in F15D- Granted patents
- 219
- Published applications
- 288
- Assignees
- 157
- Inventors
- 527
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 3 |
| 2005 | 1 | 5 |
| 2006 | 2 | 3 |
| 2007 | 2 | 3 |
| 2008 | 0 | 3 |
| 2009 | 2 | 3 |
| 2010 | 0 | 11 |
| 2011 | 0 | 4 |
| 2012 | 3 | 4 |
| 2013 | 8 | 7 |
| 2014 | 6 | 12 |
| 2015 | 4 | 18 |
| 2016 | 14 | 24 |
| 2017 | 17 | 18 |
| 2018 | 9 | 17 |
| 2019 | 13 | 31 |
| 2020 | 27 | 27 |
| 2021 | 23 | 23 |
| 2022 | 16 | 19 |
| 2023 | 11 | 19 |
| 2024 | 25 | 12 |
| 2025 | 16 | 14 |
| 2026 | 5 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Multiple input multiple output phononic subsurfaces for passive boundary layer transition delay6 Oct 2026US 12,753,783 B2The United States of America as represented by the Secretary of the Air Force
- Device to reduce turbulent flow skin friction using carbon dioxide, riblets, and suction holes4 Aug 2026US 12,698,789 B2
- Apparatus and methods for an erosion control coating on an interior surface of production equipment23 Jun 2026US 12,662,912 B2Chevron U.S.A.Inc.
- Drag reduction structure, resin molded product, shaping mold and moving object9 Jun 2026US 12,650,140 B2Dai Nippon Printing Co.Ltd.
- Blade member and structural member21 Apr 2026US 12,607,125 B2Nikon Corporation
- Separation suppression device and moving object10 Sep 2026US 2026/0266317 A1Tohoku University
- Fixing structure for laminar flow element and flow rate control device27 Aug 2026US 2026/0251161 A1Fujikin Incorporated
- Blade member and structural member2 Jul 2026US 2026/0185449 A1Nikon Corporation
- Component for a filter unit28 May 2026US 2026/0145108 A1Carl Freudenberg KG
- Vehicle airflow diverter19 Mar 2026US 2026/0078784 A1McLaren Automotive Limited
Most cited
By later US patents
- Drag reduction article88US 5,069,403 AMinnesota Mining and Manufacturing Company · 1991
- Drag reduction article86US 4,986,496 AMinnesota Mining and Manufacturing Company · 1991
- Superhydrophobic coating69US 6,994,045 B2CNT Spolka Z O.O. · 2006
- Wall with a drag reducing surface and method for making such a wall64US 4,907,765 AMesserschmitt-Boelkow-Blohm GmbH · 1990
- Device for reducing the frictional drag of moving bodies51US 4,750,693 AMesserschmitt-Bolkow-Blohm GmbH · 1988