G01F 23/74
For sensing changes in level only at discrete points
Official title: for sensing changes in level only at discrete points
G01F23/74 (For sensing changes in level only at discrete points) appears on 327 US grants and 213 published applications in this corpus.
Search patents in G01F- Granted patents
- 327
- Published applications
- 213
- Assignees
- 224
- Inventors
- 668
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 6 | 0 |
| 1989 | 10 | 0 |
| 1990 | 10 | 0 |
| 1991 | 13 | 0 |
| 1992 | 10 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 5 | 0 |
| 1996 | 10 | 0 |
| 1997 | 12 | 0 |
| 1998 | 7 | 0 |
| 1999 | 7 | 0 |
| 2000 | 9 | 0 |
| 2001 | 9 | 2 |
| 2002 | 6 | 7 |
| 2003 | 9 | 7 |
| 2004 | 5 | 4 |
| 2005 | 5 | 6 |
| 2006 | 5 | 2 |
| 2007 | 2 | 9 |
| 2008 | 4 | 2 |
| 2009 | 3 | 5 |
| 2010 | 5 | 13 |
| 2011 | 2 | 6 |
| 2012 | 6 | 5 |
| 2013 | 4 | 9 |
| 2014 | 2 | 4 |
| 2015 | 13 | 17 |
| 2016 | 12 | 7 |
| 2017 | 7 | 11 |
| 2018 | 7 | 15 |
| 2019 | 9 | 11 |
| 2020 | 12 | 18 |
| 2021 | 12 | 13 |
| 2022 | 12 | 9 |
| 2023 | 9 | 9 |
| 2024 | 8 | 4 |
| 2025 | 6 | 10 |
| 2026 | 4 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Oil level sensing and fault detection16 Jun 2026US 12,656,166 B2Textron Innovations Inc.
- Refrigerant compressor including an oil level sensor arrangement26 May 2026US 12,638,324 B2Danfoss Commercial Compressors
- Combined fuel level sending unit and fuel fill limit vent valve24 Mar 2026US 12,583,313 B2Whitecap Industries, Inc.
- Wireless drink container for monitoring hydration3 Mar 2026US 12,564,280 B2HidrateSmart LLC
- Monitoring fullness of containers15 Jul 2025US 12,359,955 B2Waste Harmonics, LLC
- Monitoring fullness of containers13 Aug 2026US 2026/0235430 A1Waste Harmonics, LLC
- Self-cleaning maintenance station and self-cleaning maintenance system30 Jul 2026US 2026/0215649 A1Beijing Roborock Technology Co., Ltd.
- Wireless drink container for monitoring hydration9 Jul 2026US 2026/0191348 A1HidrateSmart LLC
- Plumbing alarm system9 Jul 2026US 2026/0194386 A1
- Container level detector14 May 2026US 2026/0133065 A1Iveda Solutions, Inc.
Most cited
By later US patents
- Suction fitting with pump control device135US 5,167,041 AKDI American Products, Inc. · 1992
- Swimming pool control system134US 5,730,861 A1998
- Suction fitting with pump control device90US 5,347,664 AKDI American Products, Inc. · 1994
- Manifold systems for high purity chemical delivery systems75US 5,590,695 AAdvanced Delivery & Chemical Systems, Ltd. · 1997
- Chemical refill system for high purity chemicals64US 5,465,766 AAdvanced Delivery & Chemical Systems, Ltd. · 1995