G01R 33/3852
Gradient amplifiers
Official title: {Gradient amplifiers; means for controlling the application of a gradient magnetic field to the sample, e.g. a gradient signal synthesizer}
G01R33/3852 (Gradient amplifiers) appears on 378 US grants and 318 published applications in this corpus.
Search patents in G01R- Granted patents
- 378
- Published applications
- 318
- Assignees
- 92
- Inventors
- 532
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 3 | 0 |
| 1996 | 7 | 0 |
| 1997 | 5 | 0 |
| 1998 | 1 | 0 |
| 1999 | 6 | 0 |
| 2000 | 14 | 0 |
| 2001 | 13 | 2 |
| 2002 | 10 | 1 |
| 2003 | 9 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 1 | 3 |
| 2007 | 2 | 1 |
| 2008 | 1 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 3 |
| 2011 | 2 | 10 |
| 2012 | 3 | 5 |
| 2013 | 3 | 17 |
| 2014 | 7 | 7 |
| 2015 | 9 | 23 |
| 2016 | 6 | 30 |
| 2017 | 18 | 27 |
| 2018 | 27 | 29 |
| 2019 | 55 | 44 |
| 2020 | 49 | 27 |
| 2021 | 25 | 21 |
| 2022 | 21 | 16 |
| 2023 | 18 | 13 |
| 2024 | 6 | 16 |
| 2025 | 11 | 10 |
| 2026 | 11 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Device and method for prospective correction for gradient pulse shape distortions in MRI imaging6 Oct 2026US 12,754,273 B2Koninklijke Philips N. V.
- Multi-core integrated magnetic resonance imaging system with distributed, parallel, and scalable architecture15 Sep 2026US 12,736,600 B2Harbin Medical University
- Gradient coil unit with separately drivable conductor pattern pairs14 Jul 2026US 12,681,114 B2Siemens Healthineers AG
- Electromagnetic shielding for magnetic resonance imaging methods and apparatus7 Jul 2026US 12,672,791 B2Hyperfine Operations, Inc.
- System and method for operation and control of electromagnets16 Jun 2026US 12,656,431 B2Synaptive Medical Inc.
- Acquisition of Magnetic Resonance Data1 Oct 2026US 2026/0299063 A1Siemens Healthineers AG
- Power controller, system and method for medical imaging systems17 Sep 2026US 2026/0276765 A1Koninklijke Philips N. V.
- Gradient magnetic field power supply apparatus and gradient magnetic field power supply control method11 Jun 2026US 2026/0160839 A1Canon Medical Systems Corporation
- Systems and methods for providing operating power to a magnetic resonance imaging (mri) system21 May 2026US 2026/0140210 A1Hyperfine Operations, Inc.
- Magnetic resonance imaging apparatus, gradient magnetic power supply apparatus, and abnormality detection method7 May 2026US 2026/0126509 A1Canon Medical Systems Corporation
Most cited
By later US patents
- Power amplifier with multiple switched output stages, and method and driver for operating same228US 5,949,668 ASiemens Aktiengesellschaft · 1999
- Low field magnetic resonance imaging methods and apparatus120US 9,817,093 B2Hyperfine Research, Inc. · 2017
- Ferromagnetic augmentation for magnetic resonance imaging119US 9,625,544 B2Hyperfine Research, Inc. · 2017
- Methods and apparatus for thermal management of an MRI component by reducing eddy currents118US 9,645,210 B2Hyperfine Research, Inc. · 2017
- Portable magnetic resonance imaging methods and apparatus116US 10,222,434 B2Hyperfine Research, Inc. · 2019