G01F 23/00
Indicating or measuring liquid level or level of fluent solid material
Official title: Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
G01F23/00 (Indicating or measuring liquid level or level of fluent solid material) appears on 10,049 US grants and 8,336 published applications in this corpus.
Search patents in G01F- Granted patents
- 10,049
- Published applications
- 8,336
- Assignees
- 4,170
- Inventors
- 17,656
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 117 | 0 |
| 1977 | 112 | 0 |
| 1978 | 116 | 0 |
| 1979 | 90 | 0 |
| 1980 | 129 | 0 |
| 1981 | 101 | 0 |
| 1982 | 104 | 0 |
| 1983 | 107 | 0 |
| 1984 | 114 | 0 |
| 1985 | 111 | 0 |
| 1986 | 125 | 0 |
| 1987 | 129 | 0 |
| 1988 | 132 | 0 |
| 1989 | 176 | 0 |
| 1990 | 152 | 0 |
| 1991 | 194 | 0 |
| 1992 | 175 | 0 |
| 1993 | 143 | 0 |
| 1994 | 122 | 0 |
| 1995 | 122 | 0 |
| 1996 | 123 | 0 |
| 1997 | 149 | 0 |
| 1998 | 188 | 0 |
| 1999 | 152 | 0 |
| 2000 | 146 | 0 |
| 2001 | 180 | 40 |
| 2002 | 168 | 170 |
| 2003 | 199 | 180 |
| 2004 | 181 | 223 |
| 2005 | 163 | 240 |
| 2006 | 184 | 226 |
| 2007 | 164 | 258 |
| 2008 | 159 | 264 |
| 2009 | 152 | 264 |
| 2010 | 186 | 288 |
| 2011 | 190 | 254 |
| 2012 | 192 | 260 |
| 2013 | 201 | 299 |
| 2014 | 241 | 349 |
| 2015 | 293 | 423 |
| 2016 | 329 | 423 |
| 2017 | 329 | 440 |
| 2018 | 349 | 501 |
| 2019 | 463 | 492 |
| 2020 | 455 | 467 |
| 2021 | 388 | 427 |
| 2022 | 348 | 430 |
| 2023 | 332 | 409 |
| 2024 | 356 | 396 |
| 2025 | 312 | 361 |
| 2026 | 206 | 252 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01F 23/22Indicating or measuring liquid level or level of fluent solid material: by6,313
- G01F 23/30Indicating or measuring liquid level or level of fluent solid material: by1,866
- G01F 23/80Arrangements for signal processing1,197
- G01F 23/14Indicating or measuring liquid level or level of fluent solid material: by925
- G01F 23/0007Indicating or measuring liquid level or level of fluent solid material: for403
- G01F 23/02Indicating or measuring liquid level or level of fluent solid material: by354
- G01F 23/20Indicating or measuring liquid level or level of fluent solid material: by313
- G01F 23/04Indicating or measuring liquid level or level of fluent solid material: by304
All 13 subgroupsShow fewer
- G01F 23/0023Indicating or measuring liquid level or level of fluent solid material: with137
- G01F 23/0038Indicating or measuring liquid level or level of fluent solid material: using90
- G01F 23/0046Indicating or measuring liquid level or level of fluent solid material: with89
- G01F 23/003Indicating or measuring liquid level or level of fluent solid material: with45
- G01F 23/0053Indicating or measuring liquid level or level of fluent solid material: with21
Recent patents
- Injection device and a reusable part therefor6 Oct 2026US 12,752,059 B2Boehringer Ingelheim International GmbH
- Pet consumable container and method of re-supplying pet consumables6 Oct 2026US 12,754,054 B1Pet Parents, LLC
- Fluid measuring reservoir for breast pumps6 Oct 2026US 12,754,055 B2Willow Innovations, Inc.
- Modular field device6 Oct 2026US 12,754,056 B2Endress + Hauser GmbH + Co. KG
- System and method of detecting fluid levels in tanks6 Oct 2026US 12,754,057 B2Plainsight Technologies Inc.
- Inkjet recording apparatus8 Oct 2026US 2026/0307392 A1KYOCERA Document Solutions Inc.
- Measuring device for autonomous and wireless detection of fluid media in an environment8 Oct 2026US 2026/0309533 A1Arianegroup SAS
- Measuring assembly of a field device on a container8 Oct 2026US 2026/0309534 A1VEGA Grieshaber KG
- Method for determining the inner diameter of a surge pipe using a fill level measuring device8 Oct 2026US 2026/0309535 A1Endress + Hauser GmbH + Co. KG
- Signal processing for multi-sensor distance calculation and level measurement in a tank8 Oct 2026US 2026/0309536 A1Rosemount Tank Radar AB
Most cited
By later US patents
- Automatic liquid dispenser and refrigerator with the same865US 7,661,448 B2LG Electronics Inc. · 2010
- Optical identification and monitoring system using pattern recognition for use with vehicles656US 5,845,000 AAutomotive Technologies International, Inc. · 1998
- Reflection free launcher for electromagnetic guide wire602US 7,345,623 B2McEwan Technologies, LLC · 2008
- Vehicular component control systems and methods554US 6,442,465 B2Automotive Technologies International, Inc. · 2002
- Inductance-based dose measurement in syringes551US 6,068,615 AHealth Hero Network, Inc. · 2000