G01F 23/2927
For several discrete levels
Official title: {for several discrete levels, e.g. with more than one light-conducting sensing element}
G01F23/2927 (For several discrete levels) appears on 129 US grants and 108 published applications in this corpus.
Search patents in G01F- Granted patents
- 129
- Published applications
- 108
- Assignees
- 100
- Inventors
- 256
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 1 |
| 2002 | 4 | 4 |
| 2003 | 5 | 5 |
| 2004 | 2 | 5 |
| 2005 | 3 | 5 |
| 2006 | 1 | 1 |
| 2007 | 5 | 4 |
| 2008 | 2 | 5 |
| 2009 | 3 | 1 |
| 2010 | 5 | 4 |
| 2011 | 5 | 2 |
| 2012 | 0 | 7 |
| 2013 | 2 | 1 |
| 2014 | 4 | 3 |
| 2015 | 7 | 5 |
| 2016 | 3 | 2 |
| 2017 | 1 | 3 |
| 2018 | 3 | 9 |
| 2019 | 7 | 8 |
| 2020 | 8 | 10 |
| 2021 | 6 | 5 |
| 2022 | 2 | 2 |
| 2023 | 4 | 7 |
| 2024 | 4 | 5 |
| 2025 | 6 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for sensing level of liquid within a container21 Apr 2026US 12,607,495 B2Advance Fibreoptics Engineering Ltd
- Optical level gauge apparatus and method, liquid tank assembly and vehicle employing the same10 Feb 2026US 12,545,425 B2Airbus SAS
- Apparatus and method for detecting liquid level in a clear or partially clear container9 Dec 2025US 12,491,330 B2Mallinckrodt Pharmaceuticals Ireland Limited
- Quantum sensor25 Nov 2025US 12,480,876 B2Endress + Hauser GmbH + Co. KG
- Remote sensing device16 Sep 2025US 12,418,092 B2Hynds Limited
- Apparatus and method for detecting liquid level in a clear or partially clear container12 Mar 2026US 2026/0069814 A1Mallinckrodt Pharmaceuticals Ireland Limited
- Sensor With Fiber Optic Liquid Level Switch, Assembly, and Methods of Making and Using the Same20 Nov 2025US 2025/0354852 A1Westermeyer Industries Inc.
- Device, Beverage Maker, And Method For Dosing Solid And/Or Liquid Substances9 Oct 2025US 2025/0311882 A1WMF GmbH
- Systems and methods for sensing level of liquid within a container10 Apr 2025US 2025/0116544 A1Advanced Fibreoptics Engineering Ltd
- Systems and methods for sensing level of liquid within a container21 Nov 2024US 2024/0385027 A1Advanced Fibreoptics Engineering Ltd
Most cited
By later US patents
- Fill-level indicator for a liquefied-petroleum-gas tank290US 6,658,933 B2Clesse Industries · 2003
- Optical fuel level sensor141US 6,668,645 B1TI Group Automotive Systems, L.L.C. · 2003
- Sensing system for detecting presence of an ink container and level of ink therein118US 5,997,121 AXerox Corporation · 1999
- Systems and methods for determining level and/or type of a fluid71US 7,710,567 B1Strube, Inc. · 2010
- Optical fluid-level switch and controls for bilge pump apparatus69US 5,425,624 AITT Corporation · 1995