G05D 9/00
Level control
Official title: Level control, e.g. controlling quantity of material stored in vessel
G05D9/00 (Level control) appears on 794 US grants and 541 published applications in this corpus.
Search patents in G05D- Granted patents
- 794
- Published applications
- 541
- Assignees
- 544
- Inventors
- 1,533
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 13 | 0 |
| 1978 | 13 | 0 |
| 1979 | 8 | 0 |
| 1980 | 14 | 0 |
| 1981 | 23 | 0 |
| 1982 | 9 | 0 |
| 1983 | 8 | 0 |
| 1984 | 7 | 0 |
| 1985 | 10 | 0 |
| 1986 | 17 | 0 |
| 1987 | 18 | 0 |
| 1988 | 14 | 0 |
| 1989 | 24 | 0 |
| 1990 | 15 | 0 |
| 1991 | 18 | 0 |
| 1992 | 19 | 0 |
| 1993 | 13 | 0 |
| 1994 | 22 | 0 |
| 1995 | 13 | 0 |
| 1996 | 16 | 0 |
| 1997 | 13 | 0 |
| 1998 | 11 | 0 |
| 1999 | 14 | 0 |
| 2000 | 11 | 0 |
| 2001 | 15 | 0 |
| 2002 | 9 | 11 |
| 2003 | 13 | 13 |
| 2004 | 7 | 12 |
| 2005 | 7 | 12 |
| 2006 | 9 | 10 |
| 2007 | 6 | 12 |
| 2008 | 5 | 8 |
| 2009 | 5 | 6 |
| 2010 | 8 | 10 |
| 2011 | 4 | 10 |
| 2012 | 7 | 8 |
| 2013 | 8 | 25 |
| 2014 | 13 | 26 |
| 2015 | 20 | 37 |
| 2016 | 20 | 35 |
| 2017 | 33 | 21 |
| 2018 | 35 | 37 |
| 2019 | 23 | 34 |
| 2020 | 31 | 30 |
| 2021 | 34 | 26 |
| 2022 | 16 | 31 |
| 2023 | 29 | 31 |
| 2024 | 33 | 39 |
| 2025 | 32 | 26 |
| 2026 | 16 | 31 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Low voltage level controllers8 Sep 2026US 12,730,461 B1Fazor LLC
- Water level management system25 Aug 2026US 12,717,357 B2Swim Sense, LLC
- Method for avoiding critical operating conditions of a liquid tank device and liquid tank device25 Aug 2026US 12,717,358 B2Brita LP
- Devices, systems, and methods for controlling liquid levels using isolation resistance14 Jul 2026US 12,681,509 B2Trane International Inc.
- System and method for dispenser management23 Jun 2026US 12,663,821 B2GOJO Industries, Inc.
- Method for filling a fluid storage, fluid discharge device for a fluid or fluid mixture, and associated system8 Oct 2026US 2026/0309278 A1
- Devices, systems, and methods for controlling liquid levels using isolation resistance8 Oct 2026US 2026/0310244 A1Trane International Inc.
- System and method for dispenser management8 Oct 2026US 2026/0310245 A1GOJO Industries, Inc.
- Process and system for generation of coke drum outage projections8 Oct 2026US 2026/0310246 A1
- Apparatus for the Control of a Flow of a Liquid1 Oct 2026US 2026/0299625 A1
Most cited
By later US patents
- Electric motor187US 9,570,945 B2Grundfos Holding A/S · 2017
- Apparatus and method for monitoring a sump pump173US 5,672,050 ALynx Electronics, Inc. · 1997
- Mobile distribution station with guided wave radar fuel level sensors171US 10,303,190 B2Fuel Automation Station, LLC · 2019
- Method of and apparatus for making a three-dimensional product by stereolithography148US 5,174,931 A3D Systems, Inc. · 1992
- Automatic rate matching system139US 5,004,400 AHalliburton Company · 1991