G01F 23/14
Indicating or measuring liquid level or level of fluent solid material: by
Official title: by measurement of pressure
G01F23/14 (Indicating or measuring liquid level or level of fluent solid material: by) appears on 925 US grants and 686 published applications in this corpus.
Search patents in G01F- Granted patents
- 925
- Published applications
- 686
- Assignees
- 613
- Inventors
- 1,951
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 18 | 0 |
| 1978 | 17 | 0 |
| 1979 | 5 | 0 |
| 1980 | 19 | 0 |
| 1981 | 16 | 0 |
| 1982 | 14 | 0 |
| 1983 | 15 | 0 |
| 1984 | 12 | 0 |
| 1985 | 12 | 0 |
| 1986 | 15 | 0 |
| 1987 | 10 | 0 |
| 1988 | 16 | 0 |
| 1989 | 16 | 0 |
| 1990 | 14 | 0 |
| 1991 | 20 | 0 |
| 1992 | 25 | 0 |
| 1993 | 13 | 0 |
| 1994 | 20 | 0 |
| 1995 | 15 | 0 |
| 1996 | 12 | 0 |
| 1997 | 14 | 0 |
| 1998 | 15 | 0 |
| 1999 | 15 | 0 |
| 2000 | 15 | 0 |
| 2001 | 6 | 2 |
| 2002 | 12 | 11 |
| 2003 | 17 | 10 |
| 2004 | 10 | 17 |
| 2005 | 14 | 16 |
| 2006 | 16 | 16 |
| 2007 | 13 | 10 |
| 2008 | 15 | 27 |
| 2009 | 8 | 22 |
| 2010 | 15 | 21 |
| 2011 | 15 | 20 |
| 2012 | 20 | 20 |
| 2013 | 23 | 27 |
| 2014 | 16 | 42 |
| 2015 | 21 | 36 |
| 2016 | 26 | 28 |
| 2017 | 36 | 33 |
| 2018 | 30 | 38 |
| 2019 | 29 | 50 |
| 2020 | 28 | 33 |
| 2021 | 36 | 39 |
| 2022 | 29 | 37 |
| 2023 | 27 | 46 |
| 2024 | 32 | 34 |
| 2025 | 35 | 33 |
| 2026 | 16 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Pressure-based sensor system for precursor level measurement and method therefor15 Sep 2026US 12,736,383 B2ASM IP Holding B. V.
- Sensor for determining a liquid level for an aircraft tank, assembly of a tank and a sensor, method of using such a sensor28 Jul 2026US 12,693,148 B2Safran Helicopter Engines
- Method and device for determining the fuel volume in a fuel container14 Jul 2026US 12,680,855 B2Bayerische Motoren Werke Aktiengesellschaft
- Density invariant displacer-type liquid level measurement utilizing differential pressure transmitter23 Jun 2026US 12,663,304 B2Saudi Arabian Oil Company
- Physical activity user interfaces2 Jun 2026US 12,644,702 B2Apple Inc.
- Storage container1 Oct 2026US 2026/0298691 A1Kathema GmbH
- Pressure sensor and electrical appliance17 Sep 2026US 2026/0276466 A1Illinois Tool Works Inc.
- Material level sensor for 3d printing20 Aug 2026US 2026/0243593 A13D Sil Ltd.
- Device to improve the accuracy and reliability of liquid level measurements and pressure measurements using differential pressure sensing elements13 Aug 2026US 2026/0235466 A1Flow-Tronic S.A.
- Sterile filling of containers30 Jul 2026US 2026/0217396 A1
Most cited
By later US patents
- Apparatus and method for monitoring a sump pump173US 5,672,050 ALynx Electronics, Inc. · 1997
- Multiple-function fluid measuring and transmitting apparatus137US 5,469,749 AHitachi, Ltd. · 1995
- System and method for locating fluid leaks at a drape of a reduced pressure delivery system132US 8,061,360 B2KCI Licensing, Inc. · 2011
- Volumetric leak detection system for underground storage tanks and the like113US 4,852,054 ANDE Technology, Inc. · 1989
- Transmitter having input for receiving a process variable from a remote sensor108US 5,606,513 ARosemount Inc. · 1997