G01F 1/696
Circuits therefor
Official title: Circuits therefor, e.g. constant-current flow meters
G01F1/696 (Circuits therefor) appears on 1,138 US grants and 817 published applications in this corpus.
Search patents in G01F- Granted patents
- 1,138
- Published applications
- 817
- Assignees
- 413
- Inventors
- 1,629
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 8 | 0 |
| 1979 | 1 | 0 |
| 1980 | 5 | 0 |
| 1981 | 12 | 0 |
| 1982 | 14 | 0 |
| 1983 | 17 | 0 |
| 1984 | 17 | 0 |
| 1985 | 17 | 0 |
| 1986 | 20 | 0 |
| 1987 | 26 | 0 |
| 1988 | 21 | 0 |
| 1989 | 26 | 0 |
| 1990 | 16 | 0 |
| 1991 | 17 | 0 |
| 1992 | 12 | 0 |
| 1993 | 22 | 0 |
| 1994 | 18 | 0 |
| 1995 | 17 | 0 |
| 1996 | 21 | 0 |
| 1997 | 18 | 0 |
| 1998 | 21 | 0 |
| 1999 | 13 | 0 |
| 2000 | 16 | 0 |
| 2001 | 21 | 10 |
| 2002 | 22 | 12 |
| 2003 | 30 | 34 |
| 2004 | 35 | 49 |
| 2005 | 39 | 37 |
| 2006 | 41 | 35 |
| 2007 | 30 | 20 |
| 2008 | 23 | 35 |
| 2009 | 24 | 32 |
| 2010 | 29 | 26 |
| 2011 | 20 | 20 |
| 2012 | 16 | 24 |
| 2013 | 15 | 28 |
| 2014 | 30 | 32 |
| 2015 | 22 | 51 |
| 2016 | 20 | 32 |
| 2017 | 39 | 39 |
| 2018 | 36 | 42 |
| 2019 | 41 | 53 |
| 2020 | 39 | 47 |
| 2021 | 47 | 50 |
| 2022 | 38 | 32 |
| 2023 | 28 | 17 |
| 2024 | 28 | 29 |
| 2025 | 25 | 19 |
| 2026 | 16 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and controller for controlling a fluid-flow sensor22 Sep 2026US 12,742,668 B2Flusso Limited
- Sap flow sensor and method of determining sap flow velocity1 Sep 2026US 12,723,904 B2Treetoscope Ltd
- Multi-wire velocity sensor25 Aug 2026US 12,716,910 B2Tendo Technologies Inc.
- Apparatus and method of measuring air currents on surface of substrate16 Jun 2026US 12,660,576 B2Semes Co., Ltd.
- Mass flow sensor having an airfoil2 Jun 2026US 12,644,781 B2HarcoSemco, LLC
- Method for determining a flow rate of a fluid independent of the thermal properties of the fluid8 Oct 2026US 2026/0309527 A1Berkin B.V.
- High-temperature mass flow controllers and mass flow sensors1 Oct 2026US 2026/0298681 A1Illinois Tool Works Inc.
- Probe apparatus and method for measuring cryogenic exhaust flow1 Oct 2026US 2026/0298682 A1Messer Industries USA, Inc.
- Apparatus and methods for obtaining accurate fluid flow rates17 Sep 2026US 2026/0276420 A1Global Life Sciences Solutions USA LLC
- Control Device for Internal Combustion Engine20 Aug 2026US 2026/0243212 A1Hitachi Astemo, Ltd.
Most cited
By later US patents
- Intravascular pressure and flow sensor523US 5,873,835 ASciMed Life Systems, Inc. · 1999
- Flow sensor243US 4,478,077 AHoneywell Inc. · 1984
- Flow sensor235US 4,478,076 AHoneywell Inc. · 1984
- Flow sensor195US 4,501,144 AHoneywell Inc. · 1985
- Intravascular flow measurement system176US 5,617,870 ASciMed Life Systems, Inc. · 1997