G01F 1/56
Measuring the volume flow or mass flow of fluid or fluent solid
Official title: by using electric or magnetic effects (G01F1/66 takes precedence)
G01F1/56 (Measuring the volume flow or mass flow of fluid or fluent solid) appears on 1,491 US grants and 1,227 published applications in this corpus.
Search patents in G01F- Granted patents
- 1,491
- Published applications
- 1,227
- Assignees
- 576
- Inventors
- 2,266
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 23 | 0 |
| 1978 | 18 | 0 |
| 1979 | 21 | 0 |
| 1980 | 19 | 0 |
| 1981 | 27 | 0 |
| 1982 | 16 | 0 |
| 1983 | 16 | 0 |
| 1984 | 16 | 0 |
| 1985 | 19 | 0 |
| 1986 | 16 | 0 |
| 1987 | 26 | 0 |
| 1988 | 26 | 0 |
| 1989 | 7 | 0 |
| 1990 | 22 | 0 |
| 1991 | 8 | 0 |
| 1992 | 9 | 0 |
| 1993 | 14 | 0 |
| 1994 | 21 | 0 |
| 1995 | 29 | 0 |
| 1996 | 14 | 0 |
| 1997 | 16 | 0 |
| 1998 | 24 | 0 |
| 1999 | 14 | 0 |
| 2000 | 7 | 0 |
| 2001 | 10 | 4 |
| 2002 | 10 | 14 |
| 2003 | 22 | 20 |
| 2004 | 24 | 18 |
| 2005 | 21 | 25 |
| 2006 | 19 | 30 |
| 2007 | 28 | 41 |
| 2008 | 25 | 36 |
| 2009 | 29 | 48 |
| 2010 | 27 | 58 |
| 2011 | 47 | 24 |
| 2012 | 25 | 31 |
| 2013 | 25 | 46 |
| 2014 | 20 | 56 |
| 2015 | 58 | 74 |
| 2016 | 62 | 71 |
| 2017 | 63 | 73 |
| 2018 | 47 | 79 |
| 2019 | 87 | 64 |
| 2020 | 76 | 71 |
| 2021 | 53 | 65 |
| 2022 | 63 | 66 |
| 2023 | 46 | 66 |
| 2024 | 55 | 57 |
| 2025 | 53 | 41 |
| 2026 | 48 | 49 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Measuring device for single grass tree29 Sep 2026US 12,747,938 B2Hangzhou Perception Technology Company Limited
- System and method for monitoring liquid adhesive flow29 Sep 2026US 12,747,968 B2Nordson Corporation
- Automation field device29 Sep 2026US 12,747,969 B2Endress + Hauser Flowtec AG
- Automation field device29 Sep 2026US 12,747,970 B2Endress + Hauser Flowtec AG
- Flow rate detection for an aspirating smoke detection system29 Sep 2026US 12,747,971 B2Honeywell International Inc.
- Methods of measuring hematocrit in fluidic channels including conductivity sensor1 Oct 2026US 2026/0295580 A1
- Electromagnetic flowmeter with diagnostics1 Oct 2026US 2026/0298678 A1
- Ultrasonic electromagnetic sensor for multiphase cut measurements and associated methods1 Oct 2026US 2026/0298858 A1PERM Inc.
- Multiphase flow meters and related methods24 Sep 2026US 2026/0287403 A1Schlumberger Technology Corporation
- Free surface flow measurement assembly24 Sep 2026US 2026/0287404 A1Flo Sciences, LLC
Most cited
By later US patents
- Sensor having electrode for determining the rate of flow of a fluid519US 6,801,041 B2Abbott Laboratories · 2004
- Capacitance probe for fluid flow and volume measurements397US 5,596,150 AThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration · 1997
- System for identifying the presence and correctness of a medical device accessory283US 9,283,334 B2Northgate Technologies Inc. · 2016
- Electromagnetic flow meter270US 5,325,728 AMedtronic, Inc. · 1994
- In line electromagnetic flow measurement transducer98US 4,195,515 A1980