F04B 49/06
Control using electricity
Official title: Control using electricity (regulating by means of floats actuating electric switches F04B49/04)
F04B49/06 (Control using electricity) appears on 3,384 US grants and 3,786 published applications in this corpus.
Search patents in F04B- Granted patents
- 3,384
- Published applications
- 3,786
- Assignees
- 1,570
- Inventors
- 7,006
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 24 | 0 |
| 1977 | 3 | 0 |
| 1978 | 7 | 0 |
| 1979 | 5 | 0 |
| 1980 | 5 | 0 |
| 1981 | 4 | 0 |
| 1982 | 8 | 0 |
| 1983 | 10 | 0 |
| 1984 | 17 | 0 |
| 1985 | 26 | 0 |
| 1986 | 9 | 0 |
| 1987 | 13 | 0 |
| 1988 | 8 | 0 |
| 1989 | 20 | 0 |
| 1990 | 12 | 0 |
| 1991 | 20 | 0 |
| 1992 | 25 | 0 |
| 1993 | 30 | 0 |
| 1994 | 31 | 0 |
| 1995 | 20 | 0 |
| 1996 | 31 | 0 |
| 1997 | 31 | 0 |
| 1998 | 34 | 0 |
| 1999 | 45 | 0 |
| 2000 | 52 | 0 |
| 2001 | 45 | 12 |
| 2002 | 47 | 40 |
| 2003 | 42 | 39 |
| 2004 | 35 | 61 |
| 2005 | 25 | 76 |
| 2006 | 39 | 61 |
| 2007 | 19 | 56 |
| 2008 | 38 | 69 |
| 2009 | 36 | 76 |
| 2010 | 45 | 101 |
| 2011 | 59 | 83 |
| 2012 | 57 | 110 |
| 2013 | 62 | 153 |
| 2014 | 85 | 158 |
| 2015 | 101 | 172 |
| 2016 | 124 | 200 |
| 2017 | 146 | 260 |
| 2018 | 174 | 274 |
| 2019 | 262 | 243 |
| 2020 | 212 | 236 |
| 2021 | 211 | 278 |
| 2022 | 216 | 234 |
| 2023 | 228 | 254 |
| 2024 | 231 | 222 |
| 2025 | 228 | 176 |
| 2026 | 127 | 142 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fluid pump assembly6 Oct 2026US 12,753,748 B2
- Predicting frac pump component life interval6 Oct 2026US 12,753,750 B2Typhon Technology Solutions (U.S.), LLC
- Compressor6 Oct 2026US 12,753,751 B2Hitachi Industrial Equipment Systems Co., Ltd.
- Single-phase field-oriented control for a linear compressor6 Oct 2026US 12,753,752 B1Haier US Appliance Solutions, Inc.
- Electrohydraulic control device and adjustable hydraulic pump system6 Oct 2026US 12,753,781 B2HAWE Hydraulik SE
- Managing regenerative energy of reciprocating pumping unit8 Oct 2026US 2026/0309009 A1Weatherford Technology Holdings, LLC
- Performance derating control in a circulating pump8 Oct 2026US 2026/0309145 A1Grundfos Holding A/S
- Pump health monitoring system8 Oct 2026US 2026/0309146 A1Pentair Water Pool and Spa, Inc.
- Volumetric variable displacement machine8 Oct 2026US 2026/0309147 A1
- Variable speed pumping system and method8 Oct 2026US 2026/0309157 A1Pentair Water Pool and Spa, Inc.
Most cited
By later US patents
- Drug pump systems and methods1,088US 5,935,099 ASIMS Deltec, Inc. · 1999
- Apparatus for controlling driving of reciprocating compressor and method thereof1,026US 7,408,310 B2LG Electronics Inc. · 2008
- Pump simulation apparatus1,024US 5,485,408 ASIMS Deltec, Inc. · 1996
- Systems and methods for communicating with ambulatory medical devices such as drug delivery devices851US 5,338,157 APharmacia Deltec, Inc. · 1994
- Systems and methods for operating ambulatory medical devices such as drug delivery devices737US 5,658,250 ASIMS Deltec, Inc. · 1997