G01V 3/04
Using dc
Official title: using DC
G01V3/04 (Using dc) appears on 33 US grants and 31 published applications in this corpus.
Search patents in G01V- Granted patents
- 33
- Published applications
- 31
- Assignees
- 41
- Inventors
- 114
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 2 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 2 |
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 2 | 1 |
| 2017 | 0 | 3 |
| 2018 | 3 | 0 |
| 2019 | 0 | 1 |
| 2020 | 2 | 3 |
| 2021 | 0 | 3 |
| 2022 | 4 | 3 |
| 2023 | 2 | 4 |
| 2024 | 6 | 3 |
| 2025 | 1 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Detection of earbud insertion in a case17 Feb 2026US 12,556,013 B2Apple Inc.
- Randomly distributed tensor resistivity measurement method and system20 Jan 2026US 12,529,818 B2Zhejiang University
- System and method for using a magnetometer in a gyro-while-drilling survey tool19 Aug 2025US 12,392,237 B2Gyrodata, Incorporated
- Phase-synchronized buried object transmitter and locator methods and apparatus1 Oct 2024US 12,105,244 B1Seescan, Inc.
- Resistivity imaging system with compensator for parasitic impedances between electrodes and their conductive substrates17 Sep 2024US 12,092,600 B2Qinetiq Limited
- Device for injecting a current at a magnetic and/or metal structure to generate a signal measurable by magnetometric sensors and associated mapping device for checking the condition and/or geolocation of said structure5 Mar 2026US 2026/0063819 A1Skipper Ndt
- Randomly Distributed Tensor Resistivity Measurement Method and System4 Dec 2025US 2025/0370156 A1Zhejiang University
- System and method for using a magnetometer in a gyro-while-drilling survey tool3 Oct 2024US 2024/0328304 A1Gyrodata, Incorporated
- Subsea vehicle with flooded connector detection system18 Jul 2024US 2024/0241282 A1Oceaneering International, Inc.
- Detection of earbud insertion in a case28 Mar 2024US 2024/0106250 A1Apple Inc.
Most cited
By later US patents
- Optimal joule heating of the subsurface127US 5,325,918 AThe United States of America as represented by the United States Department of Energy · 1994
- Non-invasive, high resolution detection of electrical currents and electrochemical impedances at spaced localities along a pipeline83US 5,126,654 AColumbia Gas System Service Corporation · 1992
- Electrical geophysical apparatus for determining the density of porous materials and establishing geo-electric constants of porous material78US 6,380,745 B12002
- Underwater detection and deterrent system74US 6,765,487 B1The United States of America as represented by the Secretary of the Navy · 2004
- Methods and apparatus for measuring electrical properties of a ground using a graphite electrode24US 6,674,286 B2Advanced Geosciences, Inc. · 2004