G01N 27/85
Using magnetographic methods
Official title: using magnetographic methods
G01N27/85 (Using magnetographic methods) appears on 21 US grants and 17 published applications in this corpus.
Search patents in G01N- Granted patents
- 21
- Published applications
- 17
- Assignees
- 20
- Inventors
- 71
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 2 | 0 |
| 2016 | 0 | 2 |
| 2017 | 2 | 2 |
| 2018 | 1 | 0 |
| 2019 | 1 | 4 |
| 2020 | 1 | 2 |
| 2021 | 4 | 1 |
| 2022 | 1 | 1 |
| 2023 | 2 | 0 |
| 2024 | 0 | 2 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Magnetic focusing scheme for flux leakage measurement4 Nov 2025US 12,460,534 B2Schlumberger Technology Corporation
- Nondestructive testing method and device for detecting and distinguishing internal defect and external defect of wire rope18 Jul 2023US 11,703,477 B2Harbn Institute of Technology (Shenzhen) (Institute of Science and Technology Innovation)
- Method and apparatus to detect flaws in metallic pipe13 Jun 2023US 11,674,630 B2Pure Technologies Ltd.
- Method and apparatus for identifying discontinuity in wall of ferrous object31 May 2022US 11,346,811 B1United States Pipe and Foundry Company
- Scanning magnetometry motion compensation6 Jul 2021US 11,054,394 B2The Charles Stark Draper Laboratory, Inc.
- Measurement apparatus and measurement method8 Jan 2026US 2026/0009871 A1Integral Geometry Science Inc.
- Magnetic focusing scheme for flux leakage measurement16 Oct 2025US 2025/0320810 A1Schlumberger Technology Corporation
- Internal duct integrity inspection equipment using magnetic metal memory21 Nov 2024US 2024/0384825 A1Pipeway Engenharia Ltda
- Monitoring System Of Crack Propagation Of Underwater Structure Visual Based on Alternating Current Field, and Alternating Current Field Crack Visual Monitoring and Evaluation method18 Jan 2024US 2024/0019399 A1China University of Petroleum
- Nondestructive testing method and device for detecting and distinguishing internal defect and external defect of wire rope16 Jun 2022US 2022/0187246 A1Harbin Institute of Technology (Shenzhen) (Institute of Science and Technology Innovation)
Most cited
By later US patents
- Apparatus for the non-contact metallic constructions assessment29US 8,542,127 B12013
- AUV pipeline inspection using magnetic tomography10US 8,949,042 B12015
- Non-destructive system and method for detecting structural defects9US 9,964,519 B22018
- Adaptive workflows for artifact identification in electromagnetic pipe inspection6US 10,901,111 B2Halliburton Energy Services.Inc. · 2021
- Flaw detector for magnetographic quality inspection6US 4,930,026 A1990