F04D 13/12
Combinations of two or more pumps
Official title: Combinations of two or more pumps (combinations with priming pumps or booster pumps to counteract vapour-lock F04D9/04)
F04D13/12 (Combinations of two or more pumps) appears on 569 US grants and 602 published applications in this corpus.
Search patents in F04D- Granted patents
- 569
- Published applications
- 602
- Assignees
- 365
- Inventors
- 1,170
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 9 | 0 |
| 1993 | 6 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 6 | 0 |
| 1998 | 11 | 0 |
| 1999 | 11 | 0 |
| 2000 | 6 | 0 |
| 2001 | 6 | 2 |
| 2002 | 6 | 3 |
| 2003 | 3 | 5 |
| 2004 | 5 | 5 |
| 2005 | 2 | 10 |
| 2006 | 5 | 11 |
| 2007 | 2 | 5 |
| 2008 | 4 | 12 |
| 2009 | 7 | 14 |
| 2010 | 7 | 15 |
| 2011 | 6 | 7 |
| 2012 | 15 | 15 |
| 2013 | 8 | 22 |
| 2014 | 11 | 23 |
| 2015 | 9 | 35 |
| 2016 | 20 | 21 |
| 2017 | 28 | 41 |
| 2018 | 25 | 37 |
| 2019 | 29 | 38 |
| 2020 | 42 | 39 |
| 2021 | 42 | 50 |
| 2022 | 39 | 48 |
| 2023 | 45 | 44 |
| 2024 | 47 | 36 |
| 2025 | 39 | 41 |
| 2026 | 14 | 23 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Integrating domain knowledge with machine learning to optimize electrical submersible pump performance22 Sep 2026US 12,742,379 B2Schlumberger Technology Corporation
- Modular dry well pump station apparatus, system and method15 Sep 2026US 12,736,055 B2Industrial Flow Solutions Operating, LLC
- Pump system18 Aug 2026US 12,709,404 B2Airbus Operations GmbH
- Multi-pressure integrated air pump18 Aug 2026US 12,710,032 B2Intex Marketing Ltd.
- Twin pump unit casing having motor mounted touchscreens28 Jul 2026US 12,692,869 B2S. A. Armstrong Limited
- Engine system1 Oct 2026US 2026/0298145 A1ROLLS-ROYCE plc
- Twin Pump Unit Casing Having Motor Mounted Touchscreens1 Oct 2026US 2026/0298247 A1S. A. Armstrong Limited
- Pump unit1 Oct 2026US 2026/0298248 A1Ebara Corporation
- Duo-pump liquid cooling device27 Aug 2026US 2026/0255539 A1Shenzhen Apaltek Co., Ltd.
- Fuel system23 Jul 2026US 2026/0210293 A1ROLLS-ROYCE plc
Most cited
By later US patents
- Systems and methods for routing pressurized fluid305US 8,905,056 B2Halliburton Energy Services.Inc. · 2014
- Power distribution trailer for an electric driven hydraulic fracking system255US 10,794,165 B2National Service Alliance—Houston LLC · 2020
- Parameter monitoring and control for an electric driven hydraulic fracking system192US 10,753,165 B1National Service Alliance—Houston LLC · 2020
- Electric driven hydraulic fracking system181US 10,738,580 B1Service Alliance—Houston LLC · 2020
- Variable frequency drive configuration for electric driven hydraulic fracking system177US 10,753,153 B1National Service Alliance—Houston LLC · 2020