G01R 33/421
Of main or gradient magnetic field
Official title: of main or gradient magnetic field
G01R33/421 (Of main or gradient magnetic field) appears on 503 US grants and 361 published applications in this corpus.
Search patents in G01R- Granted patents
- 503
- Published applications
- 361
- Assignees
- 175
- Inventors
- 760
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 8 | 0 |
| 1987 | 4 | 0 |
| 1988 | 9 | 0 |
| 1989 | 9 | 0 |
| 1990 | 12 | 0 |
| 1991 | 10 | 0 |
| 1992 | 8 | 0 |
| 1993 | 12 | 0 |
| 1994 | 14 | 0 |
| 1995 | 10 | 0 |
| 1996 | 22 | 0 |
| 1997 | 11 | 0 |
| 1998 | 11 | 0 |
| 1999 | 11 | 0 |
| 2000 | 9 | 0 |
| 2001 | 10 | 0 |
| 2002 | 6 | 10 |
| 2003 | 10 | 9 |
| 2004 | 11 | 8 |
| 2005 | 10 | 11 |
| 2006 | 8 | 9 |
| 2007 | 9 | 15 |
| 2008 | 12 | 15 |
| 2009 | 10 | 17 |
| 2010 | 8 | 9 |
| 2011 | 8 | 10 |
| 2012 | 9 | 13 |
| 2013 | 9 | 11 |
| 2014 | 10 | 18 |
| 2015 | 10 | 10 |
| 2016 | 13 | 8 |
| 2017 | 13 | 10 |
| 2018 | 16 | 22 |
| 2019 | 24 | 23 |
| 2020 | 30 | 28 |
| 2021 | 20 | 26 |
| 2022 | 17 | 21 |
| 2023 | 20 | 17 |
| 2024 | 20 | 19 |
| 2025 | 12 | 14 |
| 2026 | 15 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Shimming device for a magnetic resonance imaging system29 Sep 2026US 12,748,169 B2Shanghai United Imaging Healthcare Co., Ltd.
- Magnetic resonance compatible robot system21 Jul 2026US 12,687,598 B2Beijing Precision Medtech Co., Ltd.
- Electromagnetic shielding for magnetic resonance imaging methods and apparatus7 Jul 2026US 12,672,791 B2Hyperfine Operations, Inc.
- Biomagnetic field sensor systems and methods for diagnostic evaluation of cardiac conditions7 Jul 2026US 12,674,851 B2SB Technology, Inc.
- Force magnetometer for reel-to-reel assessment of superconducting tapes23 Jun 2026US 12,663,486 B2The Florida State University Research Foundation, Inc.
- Local coil device, magnetic resonance device, and method for determining an inclination1 Oct 2026US 2026/0299067 A1
- Apparatus and methods for image-guided robotic surgical interventions10 Sep 2026US 2026/0266924 A1Worcester Polytechnic Institute
- Thermally isolating cabling assemblies, systems using thermally isolating cabling assemblies, and methods of fabricating thermally isolating cabling assemblies10 Sep 2026US 2026/0266937 A1D-Wave Systems Inc.
- Combined Imaging Apparatus with a Position-Determining Unit16 Jul 2026US 2026/0198878 A1Siemens Healthineers AG
- Coil assembly for a magnetic resonance examination system comprising an unshielded gradient coil21 May 2026US 2026/0140209 A1Koninklijke Philips N. V.
Most cited
By later US patents
- Patient infusion system for use with MRI230US 5,494,036 AMedrad, Inc. · 1996
- Close-in shielding system for magnetic medical treatment instruments172US 6,677,752 B1Stereotaxis, Inc. · 2004
- Structured coil electromagnets for magnetic resonance imaging and method for fabricating the same117US 5,382,904 AHouston Advanced Research Center · 1995
- Portable magnetic resonance imaging methods and apparatus116US 10,222,434 B2Hyperfine Research, Inc. · 2019
- Electromagnetic shielding for magnetic resonance imaging methods and apparatus104US 10,274,561 B2Hyperfine Research, Inc. · 2019