G01V 3/06
Using ac
Official title: using AC
G01V3/06 (Using ac) appears on 140 US grants and 76 published applications in this corpus.
Search patents in G01V- Granted patents
- 140
- Published applications
- 76
- Assignees
- 89
- Inventors
- 317
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 4 | 1 |
| 2002 | 3 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 2 | 3 |
| 2007 | 0 | 0 |
| 2008 | 2 | 2 |
| 2009 | 2 | 1 |
| 2010 | 3 | 4 |
| 2011 | 2 | 0 |
| 2012 | 0 | 3 |
| 2013 | 0 | 3 |
| 2014 | 1 | 2 |
| 2015 | 2 | 4 |
| 2016 | 2 | 8 |
| 2017 | 4 | 6 |
| 2018 | 10 | 5 |
| 2019 | 14 | 10 |
| 2020 | 5 | 6 |
| 2021 | 4 | 1 |
| 2022 | 2 | 2 |
| 2023 | 4 | 4 |
| 2024 | 5 | 4 |
| 2025 | 3 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Underground cable path tester12 May 2026US 12,625,197 B2Yongzhou Noyafa Electronic Co., Ltd.
- Circuit and apparatus for generating signal source for impedance measurement of rock and ore samples6 Jan 2026US 12,517,278 B2Giant Sequoia Ai Technology (Changsha) Limited
- Method of measuring by electrical impedance tomography11 Nov 2025US 12,468,059 B2Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- Full-decay induced polarization detection system and method for water inrush in tunnels29 Jul 2025US 12,372,681 B1Shandong University
- Detection of water in oil emulsions using spectral induced polarization15 Apr 2025US 12,276,652 B1King Fahd University of Petroleum and Minerals
- Method for arranging water exploration structure based on borehole-tunnel induced polarization and method for inversion water exploration by using the same16 Jul 2026US 2026/0202570 A1Shandong University
- Method and system for emulsion detection in geologic formations21 Aug 2025US 2025/0264450 A1King Fahd University of Petroleum and Minerals
- Underground Cable Path Tester19 Jun 2025US 2025/0199088 A1Yongzhou Noyafa Electronic Co., Ltd.
- Detection of low resistivity pay zones using spectral induced polarization method5 Jun 2025US 2025/0180769 A1King Fahd University of Petroleum and Minerals
- Circuit and apparatus for generating signal source for impedance measurement of rock and ore samples29 Aug 2024US 2024/0288604 A1Giant Sequoia Ai Technology (Changsha) Limited
Most cited
By later US patents
- Method and apparatus for rapid tomographic measurements of the electrical conductivity distribution of a sample230US 6,943,553 B2Forschungszentrum Julich GmbH · 2005
- Method and apparatus for offshore electromagnetic sounding utilizing wavelength effects to determine optimum source and detector positions152US 4,617,518 AExxon Production Research Company · 1986
- System transmitting and receiving digital and analog information for use in locating concealed conductors145US 5,264,795 AThe Charles Machine Works, Inc. · 1993
- Device for locating objects that emit electromagnetic signals136US 5,920,194 ARadiodetection Limited · 1999
- Apparatus for determining the distance to a concealed conductive object which is radiating an alternating current signal115US 4,387,340 AMetrotech Corporation · 1983