G01N 27/90
Using eddy currents
Official title: using eddy currents
G01N27/90 (Using eddy currents) appears on 1,505 US grants and 1,170 published applications in this corpus.
Search patents in G01N- Granted patents
- 1,505
- Published applications
- 1,170
- Assignees
- 702
- Inventors
- 2,897
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 20 | 0 |
| 1977 | 15 | 0 |
| 1978 | 21 | 0 |
| 1979 | 11 | 0 |
| 1980 | 16 | 0 |
| 1981 | 17 | 0 |
| 1982 | 12 | 0 |
| 1983 | 12 | 0 |
| 1984 | 22 | 0 |
| 1985 | 21 | 0 |
| 1986 | 26 | 0 |
| 1987 | 28 | 0 |
| 1988 | 22 | 0 |
| 1989 | 35 | 0 |
| 1990 | 18 | 0 |
| 1991 | 25 | 0 |
| 1992 | 27 | 0 |
| 1993 | 23 | 0 |
| 1994 | 25 | 0 |
| 1995 | 35 | 0 |
| 1996 | 23 | 0 |
| 1997 | 21 | 0 |
| 1998 | 18 | 0 |
| 1999 | 21 | 0 |
| 2000 | 18 | 0 |
| 2001 | 20 | 4 |
| 2002 | 30 | 24 |
| 2003 | 25 | 46 |
| 2004 | 39 | 33 |
| 2005 | 32 | 35 |
| 2006 | 28 | 41 |
| 2007 | 31 | 40 |
| 2008 | 24 | 36 |
| 2009 | 26 | 36 |
| 2010 | 26 | 46 |
| 2011 | 30 | 38 |
| 2012 | 40 | 49 |
| 2013 | 37 | 37 |
| 2014 | 29 | 52 |
| 2015 | 42 | 51 |
| 2016 | 47 | 54 |
| 2017 | 39 | 49 |
| 2018 | 46 | 62 |
| 2019 | 54 | 68 |
| 2020 | 68 | 68 |
| 2021 | 51 | 49 |
| 2022 | 61 | 62 |
| 2023 | 34 | 49 |
| 2024 | 45 | 55 |
| 2025 | 38 | 48 |
| 2026 | 31 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method and tool for inspecting the condition of the internal surface of pipes6 Oct 2026US 12,753,874 B2Petroleo Brasileiro S.A. - Petrobras
- C-scan data merging6 Oct 2026US 12,754,168 B2Evident Canada, Inc.
- Method for non-destructive testing of regions of interest of a metal piece during additive manufacturing22 Sep 2026US 12,741,320 B2Amiquam SA
- Multi-casing evaluation using multi-frequency, non-collocated, induction measurements11 Aug 2026US 12,704,060 B2Schlumberger Technology Corporation
- Receiver for a pulsed eddy current system11 Aug 2026US 12,704,479 B2ABB Schweiz AG
- Array probe jig8 Oct 2026US 2026/0309673 A1Mitsubishi Heavy Industries, Ltd.
- Composite detection apparatus and method of pulsed eddy current and magnetic flux leakage in oil and gas pipeline24 Sep 2026US 2026/0287125 A1China Special Equipment Inspection & Research Institute
- Multimodal processing of pulsed eddy current response signal for well integrity evaluation24 Sep 2026US 2026/0287553 A1Schlumberger Technology Corporation
- Fastener assembly sensor unit17 Sep 2026US 2026/0276022 A1Salunda Limited
- Row-column addressed 2d eddy current array17 Sep 2026US 2026/0276590 A1Evident Canada, Inc.
Most cited
By later US patents
- Apparatus and method for performing non-destructive inspections of large area aircraft structures201US 6,220,099 B1CE Nuclear Power LLC · 2001
- Self-powered pipeline vehicle for carrying out an operation on a pipeline and method186US 6,031,371 ABG plc · 2000
- Gas main robotic inspection system178US 6,917,176 B2Carnegie Mellon University · 2005
- Pipeline vehicle157US 5,878,783 ABritish Gas Corporation · 1999
- Pipeline vehicle with linked modules and carriages148US 6,107,795 ABritish Gas Corporation · 2000