G01F 1/704
Measuring the volume flow or mass flow of fluid or fluent solid
Official title: using marked regions or existing inhomogeneities within the fluid stream, e.g. statistically occurring variations in a fluid parameter (G01F1/76, G01F25/00 take precedence)
G01F1/704 (Measuring the volume flow or mass flow of fluid or fluent solid) appears on 1,041 US grants and 868 published applications in this corpus.
Search patents in G01F- Granted patents
- 1,041
- Published applications
- 868
- Assignees
- 651
- Inventors
- 2,029
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 13 | 0 |
| 1978 | 7 | 0 |
| 1979 | 14 | 0 |
| 1980 | 10 | 0 |
| 1981 | 7 | 0 |
| 1982 | 6 | 0 |
| 1983 | 9 | 0 |
| 1984 | 9 | 0 |
| 1985 | 13 | 0 |
| 1986 | 12 | 0 |
| 1987 | 10 | 0 |
| 1988 | 15 | 0 |
| 1989 | 18 | 0 |
| 1990 | 14 | 0 |
| 1991 | 8 | 0 |
| 1992 | 11 | 0 |
| 1993 | 9 | 0 |
| 1994 | 13 | 0 |
| 1995 | 15 | 0 |
| 1996 | 15 | 0 |
| 1997 | 15 | 0 |
| 1998 | 13 | 0 |
| 1999 | 10 | 0 |
| 2000 | 16 | 0 |
| 2001 | 14 | 1 |
| 2002 | 19 | 14 |
| 2003 | 17 | 11 |
| 2004 | 11 | 27 |
| 2005 | 14 | 38 |
| 2006 | 21 | 24 |
| 2007 | 32 | 41 |
| 2008 | 38 | 44 |
| 2009 | 25 | 40 |
| 2010 | 30 | 53 |
| 2011 | 35 | 30 |
| 2012 | 23 | 33 |
| 2013 | 28 | 36 |
| 2014 | 26 | 36 |
| 2015 | 29 | 45 |
| 2016 | 32 | 40 |
| 2017 | 39 | 39 |
| 2018 | 34 | 44 |
| 2019 | 51 | 41 |
| 2020 | 52 | 49 |
| 2021 | 28 | 38 |
| 2022 | 38 | 44 |
| 2023 | 33 | 35 |
| 2024 | 30 | 36 |
| 2025 | 29 | 26 |
| 2026 | 23 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Optical measurement of flow parameters22 Sep 2026US 12,742,669 B2Flowlit Ltd.
- Fluid measurement system and fluid measurement method8 Sep 2026US 12,730,122 B2Fuji Electric Co., Ltd.
- Method for determining pipeline volume, liquid chromatography system, and pipeline volume determination device1 Sep 2026US 12,724,012 B2Thermo Fisher Scientific (Shanghai) Instruments Co., Ltd.
- Apparatus for monitoring of the multiphase flow in a pipe18 Aug 2026US 12,710,298 B2Enercorp Engineered Solutions Inc.
- Wet gas holdup gas fraction and flow meter11 Aug 2026US 12,704,396 B2Saudi Arabian Oil Company
- Optical probe for measuring wall-shear stress18 Jun 2026US 2026/0169022 A1The George Washington University
- Capacitive electrical conductivity sensor integrated in a water meter23 Apr 2026US 2026/0110562 A1Itron, Inc.
- Apparatus and method for measuring fluid flow5 Mar 2026US 2026/0063457 A12Sg Technologies LLC
- Led intensity decay particle tracking velocimetry11 Dec 2025US 2025/0377282 A1United States of America as represented by the Administrator of NASA
- Device for monitoring foam volume, flow pattern, and pressure drop in foam drainage gas recovery27 Nov 2025US 2025/0362162 A1Southwest Petroleum University
Most cited
By later US patents
- Integrated fluid manipulation cartridge543US 6,440,725 B1Cepheid · 2002
- Electrochemical sensor519US 5,670,031 AFraunhofer-Gesellschaft zur angewandten Forschung e.V. · 1997
- Liquid flow rate estimation and verification by direct liquid measurement507US 5,866,795 AAPPLIED Materials.Inc. · 1999
- Method for separating analyte from a sample353US 6,893,879 B2Cepheid · 2005
- Medical infusion apparatus255US 5,211,626 AProduct Innovation Holdings Ltd. · 1993