G01F 9/00
Measuring volume flow relative to another variable
Official title: Measuring volume flow relative to another variable, e.g. of liquid fuel for an engine
G01F9/00 (Measuring volume flow relative to another variable) appears on 495 US grants and 399 published applications in this corpus.
Search patents in G01F- Granted patents
- 495
- Published applications
- 399
- Assignees
- 352
- Inventors
- 1,118
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 17 | 0 |
| 1978 | 13 | 0 |
| 1979 | 13 | 0 |
| 1980 | 8 | 0 |
| 1981 | 14 | 0 |
| 1982 | 10 | 0 |
| 1983 | 9 | 0 |
| 1984 | 11 | 0 |
| 1985 | 6 | 0 |
| 1986 | 8 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 6 | 0 |
| 2001 | 10 | 1 |
| 2002 | 6 | 7 |
| 2003 | 6 | 4 |
| 2004 | 6 | 12 |
| 2005 | 10 | 6 |
| 2006 | 5 | 10 |
| 2007 | 8 | 9 |
| 2008 | 7 | 20 |
| 2009 | 6 | 15 |
| 2010 | 7 | 6 |
| 2011 | 7 | 13 |
| 2012 | 7 | 15 |
| 2013 | 14 | 13 |
| 2014 | 7 | 22 |
| 2015 | 13 | 24 |
| 2016 | 24 | 29 |
| 2017 | 23 | 32 |
| 2018 | 30 | 36 |
| 2019 | 24 | 15 |
| 2020 | 23 | 25 |
| 2021 | 26 | 21 |
| 2022 | 15 | 18 |
| 2023 | 14 | 12 |
| 2024 | 12 | 11 |
| 2025 | 15 | 11 |
| 2026 | 6 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01F 9/001Measuring volume flow relative to another variable: with electric, electro-mechanic or electronic241
- G01F 9/02Wherein the other variable is the speed of a vehicle129
- G01F 9/008Where the other variable is the flight or running time77
- G01F 9/006Measuring volume flow relative to another variable: with mechanic means10
Recent patents
- Measurement apparatus and method15 Sep 2026US 12,736,380 B2ROLLS-ROYCE plc
- Methods and systems for intelligent metering of natrural gas25 Aug 2026US 12,716,760 B2Chengdu Qinchuan Iot Technology Co., Ltd.
- Flow meter for dosing pumps14 Jul 2026US 12,680,541 B2Advantage Controls, LLC
- Aircraft fuel quantity indication system and method16 Jun 2026US 12,656,159 B2The Boeing Company
- Systems for determining vehicle fuel level14 Apr 2026US 12,601,626 B2Geotab Inc.
- System and method for carbon emission reduction1 Oct 2026US 2026/0298683 A1Ge Digital Holdings LLC
- Apparatus for monitoring fluid flow and associated methods13 Aug 2026US 2026/0235425 A1General Electric Company
- Apparatus for Monitoring Fluid Flow13 Aug 2026US 2026/0235427 A1General Electric Company
- Methods and systems for determining vehicle fuel level9 Jul 2026US 2026/0194383 A1Geotab Inc.
- Controlling an operation of an electronic cigarette2 Jul 2026US 2026/0182665 A1Fontem Ventures B.V.
Most cited
By later US patents
- Fuel consumption estimation209US 5,913,917 ATrimble Navigation Limited · 1999
- Sonic pressure volume measuring device89US 4,474,061 AMotorola, Inc. · 1984
- Flow calculation system79US 6,789,024 B1Metropolitan Industries, Inc. · 2004
- Fuel consumption display system and method for vehicles71US 6,453,731 B1Nissan Motor Co., Ltd. · 2002
- Method and device for measuring access flow71US 6,726,647 B1Gambro AB · 2004