G01F 1/28
By drag-force
Official title: by drag-force, e.g. vane type or impact flowmeter
G01F1/28 (By drag-force) appears on 558 US grants and 316 published applications in this corpus.
Search patents in G01F- Granted patents
- 558
- Published applications
- 316
- Assignees
- 367
- Inventors
- 1,047
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 9 | 0 |
| 1978 | 12 | 0 |
| 1979 | 10 | 0 |
| 1980 | 11 | 0 |
| 1981 | 10 | 0 |
| 1982 | 8 | 0 |
| 1983 | 8 | 0 |
| 1984 | 8 | 0 |
| 1985 | 10 | 0 |
| 1986 | 6 | 0 |
| 1987 | 4 | 0 |
| 1988 | 10 | 0 |
| 1989 | 8 | 0 |
| 1990 | 19 | 0 |
| 1991 | 16 | 0 |
| 1992 | 9 | 0 |
| 1993 | 11 | 0 |
| 1994 | 13 | 0 |
| 1995 | 11 | 0 |
| 1996 | 12 | 0 |
| 1997 | 10 | 0 |
| 1998 | 15 | 0 |
| 1999 | 11 | 0 |
| 2000 | 10 | 0 |
| 2001 | 14 | 0 |
| 2002 | 9 | 8 |
| 2003 | 12 | 6 |
| 2004 | 11 | 13 |
| 2005 | 8 | 10 |
| 2006 | 9 | 7 |
| 2007 | 6 | 14 |
| 2008 | 9 | 17 |
| 2009 | 9 | 13 |
| 2010 | 9 | 15 |
| 2011 | 11 | 18 |
| 2012 | 9 | 10 |
| 2013 | 17 | 13 |
| 2014 | 8 | 11 |
| 2015 | 10 | 18 |
| 2016 | 13 | 15 |
| 2017 | 12 | 8 |
| 2018 | 16 | 29 |
| 2019 | 14 | 15 |
| 2020 | 28 | 20 |
| 2021 | 12 | 14 |
| 2022 | 11 | 9 |
| 2023 | 10 | 9 |
| 2024 | 9 | 10 |
| 2025 | 8 | 9 |
| 2026 | 8 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Measurement apparatus and method15 Sep 2026US 12,736,380 B2ROLLS-ROYCE plc
- Sensor for detecting gas and gas flow and method for manufacturing sensor element of sensor15 Sep 2026US 12,736,493 B2Hongik University Industry-Academia Cooperation Foundation
- Flow meter for dosing pumps14 Jul 2026US 12,680,541 B2Advantage Controls, LLC
- Method for determining a mass flow and conveying and measuring device12 May 2026US 12,624,978 B2CiTEX Holding GmbH
- Apparatus incorporating strain sensor for determining relative velocity, flow, or attack angle between a fluid and a body12 May 2026US 12,625,156 B2Qorvo US, Inc.
- Calibrated Flow Rate Sensing and Flow Control Device18 Jun 2026US 2026/0168826 A1Victaulic Company
- Flow meter for dosing pumps16 Apr 2026US 2026/0104044 A1Advantage Controls, LLC
- Flow sensor disc12 Mar 2026US 2026/0071901 A1UWM Research Foundation, Inc.
- Bi-level Positive Airway Pressure Device12 Feb 2026US 2026/0041872 A1Mercury Enterprises, Inc.
- Device and method for determining volumetric flow rate and quality22 Jan 2026US 2026/0022955 A1
Most cited
By later US patents
- Pump system for negative pressure wound therapy337US 7,857,806 B2Boehringer Technologies, L.P. · 2010
- Electronic smoke147US 9,072,321 B2MiniLogic Device Corporation Ltd. · 2015
- Apparatus for measuring agricultural yield130US 5,282,389 ADawn Equipment Company · 1994
- Flow metering device113US 4,765,190 AFord New Holland, Inc. · 1988
- Fiber optic wall shear stress sensor110US 6,426,796 B1Luna Innovations Incorporated · 2002