G01F 23/686
Using opto-electrically actuated indicating means
Official title: {using opto-electrically actuated indicating means}
G01F23/686 (Using opto-electrically actuated indicating means) appears on 47 US grants and 42 published applications in this corpus.
Search patents in G01F- Granted patents
- 47
- Published applications
- 42
- Assignees
- 44
- Inventors
- 125
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 4 |
| 2003 | 3 | 0 |
| 2004 | 2 | 1 |
| 2005 | 1 | 1 |
| 2006 | 2 | 3 |
| 2007 | 1 | 1 |
| 2008 | 1 | 2 |
| 2009 | 1 | 1 |
| 2010 | 1 | 1 |
| 2011 | 1 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 2 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 2 |
| 2019 | 1 | 1 |
| 2020 | 0 | 2 |
| 2021 | 3 | 2 |
| 2022 | 0 | 4 |
| 2023 | 4 | 3 |
| 2024 | 3 | 3 |
| 2025 | 2 | 2 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Sensor arrangements, sensor systems, and methods for determining height of liquids in tanks11 Aug 2026US 12,704,398 B1Mopeka Products LLC
- Incubation cassette and microplate for reducing fluid evaporation out of wells of a microplate14 Apr 2026US 12,599,907 B2Tecan Trading AG
- Liquid sensor and hydraulic unit31 Mar 2026US 12,590,943 B2Daikin Industries, Ltd.
- Liquid supply system and liquid preparation method21 Oct 2025US 12,448,271 B2Taiwan Semiconductor Manufacturing Company.Ltd
- Water level detection method, device, equipment, storage medium and system19 Aug 2025US 12,392,653 B1Shenyang Rms Medical Tech Co., Ltd
- Liquid level detector system19 Mar 2026US 2026/0079039 A1Chem-Enomics LLC
- Liquid level detection apparatus, sewage tank having liquid level detection apparatus, and cleaning device26 Feb 2026US 2026/0053306 A1Shanghai Zidong Technology Co., Ltd.
- Leak monitoring for high voltage cable terminations12 Feb 2026US 2026/0045384 A1Nexans
- System for monitoring a floating roof of a storage tank5 Feb 2026US 2026/0035170 A1Life Safety Distribution AG
- Liquid Level Detection Apparatus, Sewage Tank Having Liquid Level Detection Apparatus, and Cleaning Device11 Dec 2025US 2025/0375074 A1Shanghai Zidong Technology Co., Ltd.
Most cited
By later US patents
- System for registration of a fluid level in a receptacle128US 6,554,381 B2Pelikan Produktions AG · 2003
- Gauge for measuring liquid levels57US 5,950,487 AVista Research, Inc. · 1999
- Hall effect liquid level sensing apparatus and method42US 4,804,944 A1989
- Laser diode liquid-level/distance measurement42US 5,257,090 AUnited Technologies Corporation · 1993
- Method and system for refuelling31US 7,543,611 B2Identic AB · 2009