G01F 23/2922
With light-conducting sensing elements
Official title: {with light-conducting sensing elements, e.g. prisms}
G01F23/2922 (With light-conducting sensing elements) appears on 345 US grants and 249 published applications in this corpus.
Search patents in G01F- Granted patents
- 345
- Published applications
- 249
- Assignees
- 247
- Inventors
- 676
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 2 | 0 |
| 1979 | 5 | 0 |
| 1980 | 9 | 0 |
| 1981 | 5 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 12 | 0 |
| 1990 | 10 | 0 |
| 1991 | 11 | 0 |
| 1992 | 5 | 0 |
| 1993 | 7 | 0 |
| 1994 | 2 | 0 |
| 1995 | 7 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 6 | 0 |
| 2000 | 8 | 0 |
| 2001 | 7 | 2 |
| 2002 | 6 | 7 |
| 2003 | 7 | 15 |
| 2004 | 6 | 6 |
| 2005 | 8 | 10 |
| 2006 | 5 | 4 |
| 2007 | 10 | 7 |
| 2008 | 5 | 8 |
| 2009 | 7 | 5 |
| 2010 | 8 | 11 |
| 2011 | 7 | 6 |
| 2012 | 4 | 12 |
| 2013 | 5 | 6 |
| 2014 | 10 | 10 |
| 2015 | 12 | 13 |
| 2016 | 11 | 6 |
| 2017 | 4 | 7 |
| 2018 | 10 | 17 |
| 2019 | 12 | 12 |
| 2020 | 13 | 17 |
| 2021 | 11 | 10 |
| 2022 | 5 | 11 |
| 2023 | 10 | 22 |
| 2024 | 8 | 11 |
| 2025 | 11 | 8 |
| 2026 | 9 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Injection device and a reusable part therefor6 Oct 2026US 12,752,059 B2Boehringer Ingelheim International GmbH
- Apparatus for accumulating a fluid15 Sep 2026US 12,736,389 B2Medela, Inc.
- Sensor device and method for determining and/or monitoring a process variable of a medium in a container14 Jul 2026US 12,680,858 B2Endress + Hauser GmbH + Co. KG
- Remote gearbox lubricant level gauge system for rotorcraft23 Jun 2026US 12,663,071 B2Textron Innovations Inc.
- Liquid cartridge9 Jun 2026US 12,649,315 B2Brother Kogyo Kabushiki Kaisha
- Sensor module6 Aug 2026US 2026/0227225 A1Hosiden Corporation
- Evaporation apparatus and method for evaporation6 Aug 2026US 2026/0227298 A1Biotage AB
- Method and System for Monitoring Fluid Levels in Medical Devices23 Jul 2026US 2026/0210751 A1Becton, Dickinson and Company
- Liquid cartridge9 Apr 2026US 2026/0097587 A1Brother Kogyo Kabushiki Kaisha
- Apparatus and method for detecting liquid level in a clear or partially clear container12 Mar 2026US 2026/0069814 A1Mallinckrodt Pharmaceuticals Ireland Limited
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
- Differential fiber optic differential pressure sensor114US 4,210,029 ALad Research Industries, Inc. · 1980
- Fluid level monitoring through fluid cell protrusion111US 4,193,004 ACobe Laboratories, Inc. · 1980