G01N 2291/018
Impedance
G01N2291/018 (Impedance) appears on 73 US grants and 84 published applications in this corpus.
Search patents in G01N- Granted patents
- 73
- Published applications
- 84
- Assignees
- 71
- Inventors
- 218
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 3 |
| 2003 | 3 | 3 |
| 2004 | 2 | 1 |
| 2005 | 2 | 2 |
| 2006 | 0 | 4 |
| 2007 | 2 | 2 |
| 2008 | 2 | 1 |
| 2009 | 1 | 3 |
| 2010 | 0 | 1 |
| 2011 | 1 | 1 |
| 2012 | 1 | 4 |
| 2013 | 1 | 1 |
| 2014 | 1 | 1 |
| 2015 | 2 | 11 |
| 2016 | 2 | 7 |
| 2017 | 7 | 7 |
| 2018 | 4 | 2 |
| 2019 | 4 | 2 |
| 2020 | 5 | 8 |
| 2021 | 4 | 4 |
| 2022 | 3 | 3 |
| 2023 | 4 | 4 |
| 2024 | 2 | 5 |
| 2025 | 4 | 1 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for measuring normal incidence sound absorption coefficient of non-standard sized samples28 Jul 2026US 12,693,267 B2Southeast University
- Systems and methods for obtaining downhole fluid properties27 Jan 2026US 12,535,003 B2Baker Hughes Oilfield Operations LLC
- Photoacoustic device including a light guide system configured to transmit light through an electromagnetic interference (EMI)-reducing layer21 Oct 2025US 12,449,405 B2QUALCOMM Incorporated
- Systems and methods for tagging and acoustically characterizing containers29 Apr 2025US 12,285,762 B2Labcyte Inc.
- Single-hole ultrasonic detection device for continuous integrity and rock entry depth of concrete diaphragm wall and method using the same29 Apr 2025US 12,286,765 B2Jiangxi Academy of Water Science and Engineering
- Fluid cell device and method for measuring drilling mud properties8 Oct 2026US 2026/0309674 A1
- Method and system for measuring a variation in a dimension of a mechanical part30 Apr 2026US 2026/0118320 A1
- Structural health monitoring sensor and system15 Jan 2026US 2026/0016449 A1The University of Adelaide
- Method for measuring normal incidence sound absorption coefficient of non-standard sized samples13 Feb 2025US 2025/0052721 A1Southeast University
- Photoacoustic device including a light guide system configured to transmit light through an electromagnetic interference (emi)-reducing layer21 Nov 2024US 2024/0385145 A1QUALCOMM Incorporated
Most cited
By later US patents
- Fluidic device with integrated capacitive micromachined ultrasonic transducers119US 6,854,338 B2The Board of Trustees of the Leland Stanford Junior University · 2005
- Ultrasonic measurement apparatus115US 5,130,950 ASchlumberger Technology Corporation · 1992
- Apparatus and method for analyzing a retrieving formation fluid utilizing acoustic measurements105US 5,741,962 AHalliburton Energy Services.Inc. · 1998
- Ultrasonic authenticating button80US 9,945,818 B2QUALCOMM Incorporated · 2018
- Ultrasonic measurement apparatus63US 5,354,956 ASchlumberger Technology Corporation · 1994