G01F
Measuring volume, volume flow, mass flow or liquid level
Official title: Measuring volume, volume flow, mass flow or liquid level; metering by volume
G01F (Measuring volume, volume flow, mass flow or liquid level) appears on 30,788 US grants and 24,418 published applications in this corpus.
Search patents in G01F- Granted patents
- 30,788
- Published applications
- 24,418
- Assignees
- 10,054
- Inventors
- 47,590
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 369 | 0 |
| 1977 | 358 | 0 |
| 1978 | 349 | 0 |
| 1979 | 294 | 0 |
| 1980 | 350 | 0 |
| 1981 | 362 | 0 |
| 1982 | 348 | 0 |
| 1983 | 340 | 0 |
| 1984 | 439 | 0 |
| 1985 | 396 | 0 |
| 1986 | 370 | 0 |
| 1987 | 388 | 0 |
| 1988 | 407 | 0 |
| 1989 | 527 | 0 |
| 1990 | 482 | 0 |
| 1991 | 503 | 0 |
| 1992 | 446 | 0 |
| 1993 | 452 | 0 |
| 1994 | 457 | 0 |
| 1995 | 450 | 0 |
| 1996 | 453 | 0 |
| 1997 | 407 | 0 |
| 1998 | 557 | 0 |
| 1999 | 449 | 0 |
| 2000 | 434 | 0 |
| 2001 | 504 | 123 |
| 2002 | 535 | 480 |
| 2003 | 618 | 538 |
| 2004 | 555 | 669 |
| 2005 | 525 | 726 |
| 2006 | 555 | 703 |
| 2007 | 538 | 771 |
| 2008 | 501 | 833 |
| 2009 | 490 | 841 |
| 2010 | 598 | 852 |
| 2011 | 618 | 828 |
| 2012 | 625 | 878 |
| 2013 | 702 | 929 |
| 2014 | 754 | 1033 |
| 2015 | 826 | 1253 |
| 2016 | 993 | 1268 |
| 2017 | 1009 | 1293 |
| 2018 | 1038 | 1397 |
| 2019 | 1348 | 1392 |
| 2020 | 1355 | 1400 |
| 2021 | 1086 | 1273 |
| 2022 | 1080 | 1237 |
| 2023 | 1023 | 1087 |
| 2024 | 1006 | 1068 |
| 2025 | 902 | 896 |
| 2026 | 617 | 650 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- G01F 1/00Measuring the volume flow or mass flow of fluid or fluent solid14,656
- G01F 23/00Indicating or measuring liquid level or level of fluent solid material10,049
- G01F 15/00Details of, or accessories for, apparatus of groups g01f1/00 - g01f13/00 insofar4,678
- G01F 11/00Apparatus requiring external operation adapted at each repeated and identical operation to2,976
- G01F 25/00Testing or calibration of apparatus for measuring volume, volume flow or liquid2,620
- G01F 22/00Methods or apparatus for measuring volume of fluids or fluent solid material923
- G01F 5/00Measuring a proportion of the volume flow867
- G01F 13/00Apparatus for measuring by volume and delivering fluids or fluent solid materials783
All 13 main groupsShow fewer
- G01F 3/00Measuring the volume flow of fluids or fluent solid material wherein the742
- G01F 9/00Measuring volume flow relative to another variable495
- G01F 17/00Methods or apparatus for determining the capacity of containers or cavities, or470
- G01F 19/00Calibrated capacity measures for fluids or fluent solid material442
- G01F 7/00Volume-flow measuring devices with two or more measuring ranges256
Recent patents
- Apparatus, system and method for fluid delivery6 Oct 2026US 12,751,899 B2DEKA Products Limited Partnership
- Injection device and a reusable part therefor6 Oct 2026US 12,752,059 B2Boehringer Ingelheim International GmbH
- Volumetric measurement of micro droplets6 Oct 2026US 12,752,294 B2DH Technologies Development Pte. Ltd.
- Systems and methods for preventing and removing chemical deposits in a fluid heating device6 Oct 2026US 12,753,950 B2Rheem Manufacturing Company
- Apparatus for measuring and displaying the impulse of a liquid stream6 Oct 2026US 12,754,047 B2
- Apparatus and method for preserving beverages with remote-controlled system monitoring and data evaluation with feedback8 Oct 2026US 2026/0305632 A1LANXESS Deutschland GmbH
- Monitoring system and method for measuring a quantity of blood lost after vaginal delivery8 Oct 2026US 2026/0305952 A1Fondation Hopital Saint Joseph
- Inkjet recording apparatus8 Oct 2026US 2026/0307392 A1KYOCERA Document Solutions Inc.
- Flow meter8 Oct 2026US 2026/0309526 A1Webtec Products Limited
- Method for determining a flow rate of a fluid independent of the thermal properties of the fluid8 Oct 2026US 2026/0309527 A1Berkin B.V.
Most cited
By later US patents
- Bone cement injector1,545US 5,431,654 AStryker Corporation · 1995
- Automatic liquid dispenser and refrigerator with the same865US 7,661,448 B2LG Electronics Inc. · 2010
- Positive displacement piston flow meter with damping assembly818US 5,562,002 ASensidyne, Inc. · 1996
- Automatic feeder695US 5,037,018 ASeikosha Co., Ltd. · 1991
- Optical identification and monitoring system using pattern recognition for use with vehicles656US 5,845,000 AAutomotive Technologies International, Inc. · 1998