G01F 25/10
Testing or calibration of apparatus for measuring volume, volume flow or liquid
Official title: of flowmeters
G01F25/10 (Testing or calibration of apparatus for measuring volume, volume flow or liquid) appears on 1,746 US grants and 1,734 published applications in this corpus.
Search patents in G01F- Granted patents
- 1,746
- Published applications
- 1,734
- Assignees
- 822
- Inventors
- 3,209
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 2 | 0 |
| 1981 | 8 | 0 |
| 1982 | 12 | 0 |
| 1983 | 5 | 0 |
| 1984 | 13 | 0 |
| 1985 | 12 | 0 |
| 1986 | 13 | 0 |
| 1987 | 11 | 0 |
| 1988 | 9 | 0 |
| 1989 | 17 | 0 |
| 1990 | 18 | 0 |
| 1991 | 16 | 0 |
| 1992 | 10 | 0 |
| 1993 | 22 | 0 |
| 1994 | 10 | 0 |
| 1995 | 24 | 0 |
| 1996 | 20 | 0 |
| 1997 | 13 | 0 |
| 1998 | 19 | 0 |
| 1999 | 15 | 0 |
| 2000 | 9 | 0 |
| 2001 | 12 | 3 |
| 2002 | 15 | 15 |
| 2003 | 21 | 28 |
| 2004 | 29 | 29 |
| 2005 | 22 | 41 |
| 2006 | 34 | 45 |
| 2007 | 32 | 45 |
| 2008 | 32 | 61 |
| 2009 | 38 | 63 |
| 2010 | 61 | 66 |
| 2011 | 46 | 59 |
| 2012 | 41 | 62 |
| 2013 | 45 | 68 |
| 2014 | 67 | 92 |
| 2015 | 56 | 72 |
| 2016 | 66 | 76 |
| 2017 | 70 | 106 |
| 2018 | 64 | 103 |
| 2019 | 96 | 101 |
| 2020 | 121 | 111 |
| 2021 | 73 | 92 |
| 2022 | 100 | 100 |
| 2023 | 89 | 93 |
| 2024 | 86 | 83 |
| 2025 | 71 | 67 |
| 2026 | 52 | 53 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Testing augmenation scheme by stipulating multi-phase flow meter (MFPM) engineering enhancement methodology “tassmeem”6 Oct 2026US 12,754,060 B2Saudi Arabian Oil Company
- Method and apparatus to determine utility usage29 Sep 2026US 12,747,977 B2Arad Measuring Technologies Ltd.
- Metering systems and methods22 Sep 2026US 12,742,671 B2Sur-Flo Meters & Controls Ltd.
- Systems and methods for updating a calibration of a harvester flow rate sensor during unloading of a crop material22 Sep 2026US 12,742,672 B2CNH Industrial America LLC
- Measurement apparatus and method15 Sep 2026US 12,736,380 B2ROLLS-ROYCE plc
- Methods for determining continuous gas supply time based on smart gas, internet of things (iot) systems and media thereof1 Oct 2026US 2026/0298418 A1Chengdu Qinchuan Iot Technology Co., Ltd.
- Digitally assisted microwave multiphase flow meter1 Oct 2026US 2026/0298693 A1King Abdullah University of Science and Technology
- Multiphase flowmeter (mpfm) liquid referencing vehicle1 Oct 2026US 2026/0298694 A1Saudi Arabian Oil Company
- Validating a reading from an analog flow meter1 Oct 2026US 2026/0301435 A1Waltero Holding AB
- Categorizing a discrepancy in a measurement readout of a flow meter24 Sep 2026US 2026/0287412 A1Waltero Holding AB
Most cited
By later US patents
- Delivery of aerosol medications for inspiration598US 5,404,871 AAradigm Corporation · 1995
- Liquid flow rate estimation and verification by direct liquid measurement507US 5,866,795 AAPPLIED Materials.Inc. · 1999
- Gas flow rate verification unit475US 7,716,993 B2Ckd Corporation · 2010
- System and method for gas flow verification474US 7,376,520 B2Lam Research Corporation · 2008
- Automatic aerosol medication delivery system and methods279US 5,394,866 AAradigm Corporation · 1995