F04D 29/669
Especially adapted for liquid pumps
Official title: {especially adapted for liquid pumps (F04D29/18 takes precedence)}
F04D29/669 (Especially adapted for liquid pumps) appears on 348 US grants and 306 published applications in this corpus.
Search patents in F04D- Granted patents
- 348
- Published applications
- 306
- Assignees
- 237
- Inventors
- 874
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 9 | 0 |
| 1993 | 4 | 0 |
| 1994 | 9 | 0 |
| 1995 | 4 | 0 |
| 1996 | 10 | 0 |
| 1997 | 8 | 0 |
| 1998 | 9 | 0 |
| 1999 | 6 | 0 |
| 2000 | 12 | 0 |
| 2001 | 11 | 4 |
| 2002 | 7 | 8 |
| 2003 | 8 | 6 |
| 2004 | 6 | 6 |
| 2005 | 4 | 6 |
| 2006 | 2 | 7 |
| 2007 | 3 | 6 |
| 2008 | 2 | 6 |
| 2009 | 4 | 3 |
| 2010 | 4 | 7 |
| 2011 | 4 | 15 |
| 2012 | 5 | 7 |
| 2013 | 7 | 3 |
| 2014 | 5 | 14 |
| 2015 | 10 | 20 |
| 2016 | 11 | 18 |
| 2017 | 11 | 17 |
| 2018 | 10 | 8 |
| 2019 | 12 | 17 |
| 2020 | 22 | 18 |
| 2021 | 11 | 24 |
| 2022 | 19 | 22 |
| 2023 | 16 | 12 |
| 2024 | 23 | 19 |
| 2025 | 25 | 20 |
| 2026 | 11 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
- Automatic pump protection system333US 4,913,625 AWestinghouse Electric Corp. · 1990
- System for reducing noise in a hydraulic fracturing fleet263US 9,587,649 B2U.S. Well Services, LLC · 2017
- Motorized system integrated control and diagnostics using vibration, pressure, temperature, speed, and/or current analysis245US 7,539,549 B1Rockwell Automation Technologies, Inc. · 2009
- System and method for detecting and diagnosing pump cavitation217US 6,655,922 B1Rockwell Automation Technologies, Inc. · 2003
- System and method of detecting cavitation in pumps166US 9,777,748 B2Eaton Corporation · 2017