G01R 33/3635
Multi-frequency operation
Official title: {Multi-frequency operation}
G01R33/3635 (Multi-frequency operation) appears on 291 US grants and 276 published applications in this corpus.
Search patents in G01R- Granted patents
- 291
- Published applications
- 276
- Assignees
- 151
- Inventors
- 585
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 7 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 4 | 0 |
| 2001 | 9 | 2 |
| 2002 | 4 | 4 |
| 2003 | 3 | 2 |
| 2004 | 4 | 5 |
| 2005 | 2 | 10 |
| 2006 | 11 | 10 |
| 2007 | 6 | 14 |
| 2008 | 8 | 14 |
| 2009 | 11 | 15 |
| 2010 | 6 | 11 |
| 2011 | 8 | 8 |
| 2012 | 8 | 14 |
| 2013 | 9 | 10 |
| 2014 | 8 | 16 |
| 2015 | 5 | 11 |
| 2016 | 8 | 9 |
| 2017 | 14 | 5 |
| 2018 | 12 | 16 |
| 2019 | 20 | 14 |
| 2020 | 17 | 25 |
| 2021 | 19 | 12 |
| 2022 | 18 | 11 |
| 2023 | 12 | 14 |
| 2024 | 6 | 10 |
| 2025 | 10 | 10 |
| 2026 | 9 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Multi-core integrated magnetic resonance imaging system with distributed, parallel, and scalable architecture15 Sep 2026US 12,736,600 B2Harbin Medical University
- Built-in coil current sensing for 1H/23NA MRI1 Sep 2026US 12,724,094 B2Imam Abdulrahman Bin Faisal University
- Low-loss switching for circuits, low-loss switching for nuclear magnetic resonance radio frequency coils, methods of use, methods of making, systems, and devices11 Aug 2026US 12,704,568 B2The Texas A&M University System
- NMR measurement apparatus21 Jul 2026US 12,687,599 B2JEOL Ltd.
- Magnetic resonance multi-core radio frequency coil device and control method, and magnetic resonance imaging system9 Jun 2026US 12,650,479 B2Shenzhen Institutes of Advanced Technology
- Dual resonator structure for nuclear magnetic resonance (nmr) spectroscopy3 Sep 2026US 2026/0259287 A1Phoenix NMR
- Dual-resonant magnetic resonance tomography local coil with integrated pilot tone signal frequency converter18 Jun 2026US 2026/0169107 A1
- Multi-core Integrated Magnetic Resonance Imaging System with Distributed, Parallel, and Scalable Architecture19 Feb 2026US 2026/0050052 A1Harbin Medical University
- Hybrid coupler for magnetic resonance imaging5 Feb 2026US 2026/0036656 A1Imam Abdulrahman Bin Faisal University
- System and Methods for Organ-Targeted Multinuclear Functional and Molecular Magnetic Resonance Imaging16 Oct 2025US 2025/0321305 A1
Most cited
By later US patents
- Dual frequency surface probes120US 4,691,163 AElscint Ltd. · 1987
- NMR probe circuit for generating close frequency resonances63US 6,933,725 B2Bruker BioSpin GmbH · 2005
- Coplanar RF probe coil arrangement for multifrequency excitation62US 6,201,392 B1Bruker Instruments, Inc. · 2001
- RF coil for imaging system58US 6,633,161 B1The General Hospital Corporation · 2003
- Multiple tuning NMR probe50US 4,742,304 APhospho-Energetics, Inc. · 1988