G01F 23/2921
For discrete levels
Official title: {for discrete levels}
G01F23/2921 (For discrete levels) appears on 677 US grants and 584 published applications in this corpus.
Search patents in G01F- Granted patents
- 677
- Published applications
- 584
- Assignees
- 504
- Inventors
- 1,610
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 10 | 0 |
| 1979 | 6 | 0 |
| 1980 | 11 | 0 |
| 1981 | 9 | 0 |
| 1982 | 10 | 0 |
| 1983 | 6 | 0 |
| 1984 | 6 | 0 |
| 1985 | 1 | 0 |
| 1986 | 5 | 0 |
| 1987 | 10 | 0 |
| 1988 | 8 | 0 |
| 1989 | 19 | 0 |
| 1990 | 15 | 0 |
| 1991 | 15 | 0 |
| 1992 | 7 | 0 |
| 1993 | 12 | 0 |
| 1994 | 5 | 0 |
| 1995 | 8 | 0 |
| 1996 | 7 | 0 |
| 1997 | 9 | 0 |
| 1998 | 16 | 0 |
| 1999 | 10 | 0 |
| 2000 | 13 | 0 |
| 2001 | 13 | 3 |
| 2002 | 12 | 9 |
| 2003 | 14 | 21 |
| 2004 | 11 | 13 |
| 2005 | 12 | 16 |
| 2006 | 9 | 10 |
| 2007 | 15 | 12 |
| 2008 | 8 | 15 |
| 2009 | 11 | 18 |
| 2010 | 14 | 27 |
| 2011 | 14 | 12 |
| 2012 | 12 | 18 |
| 2013 | 8 | 14 |
| 2014 | 16 | 15 |
| 2015 | 22 | 24 |
| 2016 | 17 | 18 |
| 2017 | 11 | 23 |
| 2018 | 18 | 38 |
| 2019 | 34 | 30 |
| 2020 | 28 | 35 |
| 2021 | 28 | 31 |
| 2022 | 19 | 36 |
| 2023 | 33 | 52 |
| 2024 | 22 | 42 |
| 2025 | 26 | 27 |
| 2026 | 22 | 25 |
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.
- Liquid sensing arrangement for beverage machine8 Sep 2026US 12,727,710 B2Keurig Green Mountain, Inc.
- Sensor system for dry powder electrode formation and methods of using the same8 Sep 2026US 12,728,565 B2Matthews International Corporation
- Sensor device for measuring the level of material contained in a container25 Aug 2026US 12,716,763 B2Lesaffre Et Compagnie
- Improvements in or relating to gas apparatus27 Aug 2026US 2026/0249220 A1Peak Scientific Instruments Limited
- Sensor module6 Aug 2026US 2026/0227225 A1Hosiden Corporation
- Evaporation apparatus and method for evaporation6 Aug 2026US 2026/0227298 A1Biotage AB
- Apparatus for optical liquid sensing in refillable articles for aerosol provision systems30 Jul 2026US 2026/0219091 A1Nicoventures Trading Limited
- Method and System for Monitoring Fluid Levels in Medical Devices23 Jul 2026US 2026/0210751 A1Becton, Dickinson and Company
Most cited
By later US patents
- Fill-level indicator for a liquefied-petroleum-gas tank290US 6,658,933 B2Clesse Industries · 2003
- Apparatus and method for sensing fluid level240US 5,747,824 AAlcon Laboratories, Inc. · 1998
- Electronic urine flow monitor198US 4,343,316 AC. R. Bard, Inc. · 1982
- Method and apparatus for monitoring the level of the contents in a container184US 4,920,336 AFisher Scientific Company · 1990
- Method of and apparatus for making a three-dimensional product by stereolithography148US 5,174,931 A3D Systems, Inc. · 1992