G01F 23/2924
For several discrete levels
Official title: {for several discrete levels, e.g. with more than one light-conducting sensing element (G01F23/2927 takes precedence)}
G01F23/2924 (For several discrete levels) appears on 26 US grants and 25 published applications in this corpus.
Search patents in G01F- Granted patents
- 26
- Published applications
- 25
- Assignees
- 33
- Inventors
- 84
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 2 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 2 |
| 2017 | 0 | 1 |
| 2018 | 3 | 1 |
| 2019 | 1 | 2 |
| 2020 | 2 | 2 |
| 2021 | 0 | 1 |
| 2022 | 1 | 2 |
| 2023 | 0 | 4 |
| 2024 | 1 | 3 |
| 2025 | 2 | 0 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Remote gearbox lubricant level gauge system for rotorcraft23 Jun 2026US 12,663,071 B2Textron Innovations Inc.
- Fuel gauging sensing devices26 May 2026US 12,638,323 B2Airbus Operations GmbH
- Systems and methods for sensing level of liquid within a container21 Apr 2026US 12,607,495 B2Advance Fibreoptics Engineering Ltd
- Quantum sensor25 Nov 2025US 12,480,876 B2Endress + Hauser GmbH + Co. KG
- Fluid level sensing arrays for aircraft21 Jan 2025US 12,203,796 B2Textron Innovations Inc.
- Systems and methods for sensing level of liquid within a container21 Nov 2024US 2024/0385027 A1Advanced Fibreoptics Engineering Ltd
- Remote gearbox lubricant level gauge system for rotorcraft14 Nov 2024US 2024/0376976 A1Textron Innovations Inc.
- Sensor device and method for determining and/or monitoring a process variable of a medium in a container22 Feb 2024US 2024/0060812 A1Endress + Hauser GmbH + Co. KG
- Fluid Level Sensing Arrays for Aircraft23 Nov 2023US 2023/0375391 A1Textron Innovations Inc.
- Quantum sensor26 Oct 2023US 2023/0341327 A1Endress + Hauser GmbH + Co. KG
Most cited
By later US patents
- Optical fluid level monitor73US 4,286,464 ATechnical Development Company · 1981
- Systems and methods for determining level and/or type of a fluid71US 7,710,567 B1Strube, Inc. · 2010
- Optical probe43US 4,713,552 AElectricite de France (Service National) · 1987
- Multi-level fiber-optic liquid-level sensing system43US 4,979,797 AIMO Industries, Inc. · 1990
- Liquid level sensing system36US 8,695,420 B1The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 2014