F04B 49/007
Installations or systems with two or more pumps or pump cylinders, wherein
Official title: {Installations or systems with two or more pumps or pump cylinders, wherein the flow-path through the stages can be changed, e.g. from series to parallel (centrifugal pumps F04D15/0072)}
F04B49/007 (Installations or systems with two or more pumps or pump cylinders, wherein) appears on 193 US grants and 151 published applications in this corpus.
Search patents in F04B- Granted patents
- 193
- Published applications
- 151
- Assignees
- 140
- Inventors
- 399
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 14 | 0 |
| 1978 | 7 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 2 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 2 | 0 |
| 2009 | 1 | 1 |
| 2010 | 1 | 2 |
| 2011 | 0 | 4 |
| 2012 | 2 | 1 |
| 2013 | 2 | 3 |
| 2014 | 3 | 4 |
| 2015 | 0 | 4 |
| 2016 | 4 | 8 |
| 2017 | 5 | 5 |
| 2018 | 3 | 7 |
| 2019 | 5 | 6 |
| 2020 | 6 | 7 |
| 2021 | 12 | 28 |
| 2022 | 18 | 13 |
| 2023 | 18 | 20 |
| 2024 | 18 | 13 |
| 2025 | 16 | 14 |
| 2026 | 5 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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Most cited
By later US patents
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