G01F 1/68
Measuring the volume flow or mass flow of fluid or fluent solid
Official title: by using thermal effects
G01F1/68 (Measuring the volume flow or mass flow of fluid or fluent solid) appears on 3,082 US grants and 2,430 published applications in this corpus.
Search patents in G01F- Granted patents
- 3,082
- Published applications
- 2,430
- Assignees
- 939
- Inventors
- 4,324
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 10 | 0 |
| 1978 | 17 | 0 |
| 1979 | 5 | 0 |
| 1980 | 11 | 0 |
| 1981 | 23 | 0 |
| 1982 | 30 | 0 |
| 1983 | 35 | 0 |
| 1984 | 48 | 0 |
| 1985 | 42 | 0 |
| 1986 | 36 | 0 |
| 1987 | 40 | 0 |
| 1988 | 38 | 0 |
| 1989 | 56 | 0 |
| 1990 | 61 | 0 |
| 1991 | 49 | 0 |
| 1992 | 40 | 0 |
| 1993 | 56 | 0 |
| 1994 | 62 | 0 |
| 1995 | 52 | 0 |
| 1996 | 42 | 0 |
| 1997 | 39 | 0 |
| 1998 | 57 | 0 |
| 1999 | 37 | 0 |
| 2000 | 38 | 0 |
| 2001 | 54 | 20 |
| 2002 | 65 | 68 |
| 2003 | 95 | 89 |
| 2004 | 97 | 125 |
| 2005 | 93 | 86 |
| 2006 | 89 | 85 |
| 2007 | 82 | 81 |
| 2008 | 65 | 98 |
| 2009 | 65 | 90 |
| 2010 | 84 | 80 |
| 2011 | 63 | 79 |
| 2012 | 43 | 85 |
| 2013 | 65 | 89 |
| 2014 | 83 | 91 |
| 2015 | 77 | 121 |
| 2016 | 53 | 116 |
| 2017 | 99 | 133 |
| 2018 | 106 | 140 |
| 2019 | 129 | 137 |
| 2020 | 130 | 142 |
| 2021 | 115 | 124 |
| 2022 | 118 | 110 |
| 2023 | 87 | 66 |
| 2024 | 84 | 80 |
| 2025 | 69 | 48 |
| 2026 | 34 | 47 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Compact fluid flow sensor6 Oct 2026US 12,754,051 B2Advanced Energy Industries, Inc.
- 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
- Data processing device and gas conversion system25 Aug 2026US 12,715,825 B2Kabushiki Kaisha Toshiba
- Multi-wire velocity sensor25 Aug 2026US 12,716,910 B2Tendo Technologies Inc.
- 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
- Flow conditioning device configured for implementation with a flow sensor in components of dispensing systems and dispensing systems and processes implementing the same10 Sep 2026US 2026/0266642 A1Nordson Corporation
Most cited
By later US patents
- Immersible thermal mass flow meter595US 6,971,274 B2Sierra Instruments, Inc. · 2005
- 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
- Respiratory humidification system235US 6,272,933 B1Fisher & Paykel Limited · 2001