G01F 1/663
By measuring doppler frequency shift
Official title: by measuring Doppler frequency shift
G01F1/663 (By measuring doppler frequency shift) appears on 356 US grants and 285 published applications in this corpus.
Search patents in G01F- Granted patents
- 356
- Published applications
- 285
- Assignees
- 245
- Inventors
- 718
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 9 | 0 |
| 1982 | 7 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 2 | 0 |
| 1990 | 7 | 0 |
| 1991 | 5 | 0 |
| 1992 | 10 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 6 | 0 |
| 1996 | 4 | 0 |
| 1997 | 3 | 0 |
| 1998 | 9 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 2 | 0 |
| 2002 | 4 | 3 |
| 2003 | 10 | 8 |
| 2004 | 4 | 2 |
| 2005 | 4 | 13 |
| 2006 | 4 | 6 |
| 2007 | 4 | 13 |
| 2008 | 5 | 12 |
| 2009 | 8 | 6 |
| 2010 | 9 | 11 |
| 2011 | 8 | 10 |
| 2012 | 11 | 9 |
| 2013 | 8 | 8 |
| 2014 | 7 | 16 |
| 2015 | 10 | 11 |
| 2016 | 12 | 15 |
| 2017 | 11 | 12 |
| 2018 | 9 | 18 |
| 2019 | 16 | 24 |
| 2020 | 21 | 10 |
| 2021 | 14 | 18 |
| 2022 | 15 | 23 |
| 2023 | 9 | 18 |
| 2024 | 13 | 8 |
| 2025 | 11 | 6 |
| 2026 | 8 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- System and method for monitoring multiphase fluid flow21 Apr 2026US 12,607,490 B1Imam Mohammad Ibn Saud Islamic University
- System and method for early warning of solids pluggage in gas-solid multi-phase flow through transport pipe10 Mar 2026US 12,571,666 B2GE Infrastructure Technology LLC
- Acoustic control and characterization of sampling interface10 Feb 2026US 12,546,636 B2DH Technologies Development Pte. Ltd.
- Monitoring system and method for monitoring milk flow during breast feeding or milk expression27 Jan 2026US 12,533,074 B2Koninklijke Philips N. V.
- Wearable user device, computer program, method, and apparatus for non-invasive measurement of fluids in living tissue25 Jun 2026US 2026/0174333 A1Sony Group Corporation
- Ultrasonic flow meter18 Jun 2026US 2026/0168831 A1Belimo Holding AG
- Vascular monitoring system, device and method7 May 2026US 2026/0123905 A1Baxter Healthcare S. A.
- Aspiration catheter with automatic sensing16 Apr 2026US 2026/0102181 A1Boston Scientific Scimed, Inc.
- Pit sensor19 Mar 2026US 2026/0079038 A1Xorro Pty Ltd
Most cited
By later US patents
- Apparatus, system and method for measuring spatial average velocity and/or volumetric flow of blood in a vessel and screw joint for use therewith325US 5,174,295 ACardiometrics, Inc. · 1992
- Apparatus, system and method for measuring spatial average velocity and/or volumetric flow of blood in a vessel225US 4,967,753 ACardiometrics, Inc. · 1990
- Measurement of absolute vascular flow197US 5,333,614 A1994
- Apparatus and method for continuously measuring volumetric blood flow using multiple transducer and catheter for use therewith180US 4,947,852 ACardiometrics, Inc. · 1990
- Apparatus for the treatment of blood in particular for hemodialysis and hemofiltration173US 4,923,598 AFresenius AG · 1990