F04D 29/464
Adjusting flow cross-section, otherwise than by using adjustable stator blades
Official title: {adjusting flow cross-section, otherwise than by using adjustable stator blades}
F04D29/464 (Adjusting flow cross-section, otherwise than by using adjustable stator blades) appears on 227 US grants and 215 published applications in this corpus.
Search patents in F04D- Granted patents
- 227
- Published applications
- 215
- Assignees
- 109
- Inventors
- 450
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 2 | 1 |
| 2004 | 0 | 4 |
| 2005 | 2 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 2 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 5 |
| 2011 | 2 | 2 |
| 2012 | 5 | 2 |
| 2013 | 3 | 1 |
| 2014 | 2 | 8 |
| 2015 | 6 | 5 |
| 2016 | 0 | 20 |
| 2017 | 7 | 13 |
| 2018 | 12 | 12 |
| 2019 | 19 | 24 |
| 2020 | 18 | 27 |
| 2021 | 14 | 25 |
| 2022 | 30 | 21 |
| 2023 | 21 | 13 |
| 2024 | 19 | 10 |
| 2025 | 10 | 8 |
| 2026 | 5 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Centrifugal compressor67US 4,378,194 ACarrier Corporation · 1983
- Devices and methods of operation thereof for providing stable flow for centrifugal compressors50US 7,326,027 B1The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 2008
- Diffuser throttle ring control44US 4,460,310 ACarrier Corporation · 1984
- Variable pipe diffuser for centrifugal compressor43US 5,807,071 A1998
- Variable geometry diffuser mechanism40US 6,872,050 B2York International Corporation · 2005