F16K 21/185
With electrical or magnetical means
Official title: {with electrical or magnetical means, e.g. with magnetic floats, for sensing the liquid level}
F16K21/185 (With electrical or magnetical means) appears on 32 US grants and 33 published applications in this corpus.
Search patents in F16K- Granted patents
- 32
- Published applications
- 33
- Assignees
- 21
- Inventors
- 66
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 2 |
| 2004 | 3 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 3 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 2 |
| 2016 | 1 | 0 |
| 2017 | 0 | 3 |
| 2018 | 0 | 3 |
| 2019 | 3 | 5 |
| 2020 | 5 | 3 |
| 2021 | 3 | 2 |
| 2022 | 2 | 1 |
| 2023 | 1 | 2 |
| 2024 | 3 | 1 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Flow control of an injection molding system23 Dec 2025US 12,502,816 B2Incoe Corporation
- Fluid control apparatus, fluid control device, and operation analysis system16 Apr 2024US 11,960,308 B2Fujikin Incorporated
- Fluid flow control based on a liquid level in a container5 Mar 2024US 11,921,528 B2
- Overfill prevention valve2 Jan 2024US 11,859,731 B2Franklin Fueling Systems, Inc.
- Flow control of an injection molding system8 Aug 2023US 11,718,005 B2Incoe Corporation
- Techniques for fluid control4 Jun 2026US 2026/0153162 A1
- Pool filling apparatus13 Feb 2025US 2025/0052083 A1
- Fluid flow control based on a liquid level in a container25 Jul 2024US 2024/0248495 A1
- Flow control of an injection molding system12 Oct 2023US 2023/0321881 A1Incoe Corporation
- Fluid flow control based on a liquid level in a container27 Apr 2023US 2023/0130299 A1
Most cited
By later US patents
- Magnetic automatic stop valve73US 6,695,004 B1Alaris Medical Systems, Inc. · 2004
- Structure of fluid level controller of piping type33US 5,025,827 A1991
- Toilet fill valve with adjustable bowl fill flow30US 6,823,889 B1MJSI, Inc. · 2004
- Liquid level sensing and control assembly24US 4,771,804 A1988
- Liquid nitrogen level controller19US 4,135,548 AThe United States of America as represented by the Secretary of the Air Force · 1979