G01R 33/36
Electrical details
Official title: Electrical details, e.g. matching or coupling of the coil to the receiver
G01R33/36 (Electrical details) appears on 2,916 US grants and 2,730 published applications in this corpus.
Search patents in G01R- Granted patents
- 2,916
- Published applications
- 2,730
- Assignees
- 627
- Inventors
- 3,599
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 6 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 15 | 0 |
| 1987 | 40 | 0 |
| 1988 | 50 | 0 |
| 1989 | 44 | 0 |
| 1990 | 29 | 0 |
| 1991 | 38 | 0 |
| 1992 | 32 | 0 |
| 1993 | 31 | 0 |
| 1994 | 35 | 0 |
| 1995 | 38 | 0 |
| 1996 | 38 | 0 |
| 1997 | 30 | 0 |
| 1998 | 12 | 0 |
| 1999 | 23 | 0 |
| 2000 | 30 | 0 |
| 2001 | 36 | 5 |
| 2002 | 37 | 32 |
| 2003 | 36 | 40 |
| 2004 | 34 | 31 |
| 2005 | 33 | 53 |
| 2006 | 48 | 66 |
| 2007 | 46 | 73 |
| 2008 | 56 | 105 |
| 2009 | 72 | 102 |
| 2010 | 77 | 118 |
| 2011 | 76 | 93 |
| 2012 | 67 | 104 |
| 2013 | 84 | 138 |
| 2014 | 87 | 134 |
| 2015 | 69 | 166 |
| 2016 | 88 | 134 |
| 2017 | 158 | 152 |
| 2018 | 154 | 170 |
| 2019 | 225 | 172 |
| 2020 | 208 | 155 |
| 2021 | 159 | 155 |
| 2022 | 157 | 125 |
| 2023 | 122 | 107 |
| 2024 | 97 | 120 |
| 2025 | 91 | 115 |
| 2026 | 83 | 65 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01R 33/3628Tuning/matching of the transmit/receive coil817
- G01R 33/3642Mutual coupling or decoupling of multiple coils739
- G01R 33/3621Nmr receivers or demodulators539
- G01R 33/3607Rf waveform generators358
- G01R 33/3692Involving signal transmission without using electrically conductive connections352
- G01R 33/3614Rf power amplifiers300
- G01R 33/3678Involving quadrature drive or detection269
- G01R 33/3664Switching for purposes other than coil coupling or decoupling240
Recent patents
- Radio frequency receiver array for magnetic resonance imaging6 Oct 2026US 12,754,265 B2Koninklijke Philips N. V.
- Reception cable and medical image diagnostic system6 Oct 2026US 12,755,867 B2FUJIFILM Corporation
- Magnetic field enhancement assembly and magnetic field enhancement device29 Sep 2026US 12,748,167 B2Beijing Tsinghua Changgung Hospital
- Magnetic resonance imaging apparatus and automatic channel selection method of multi-channel reception coil29 Sep 2026US 12,748,171 B2FUJIFILM Corporation
- Transmission line with twisted coaxial cables29 Sep 2026US 12,749,788 B2Koninklijke Philips N. V.
- Magnetic resonance imaging apparatus1 Oct 2026US 2026/0299062 A1Canon Medical Systems Corporation
- Acquisition of Magnetic Resonance Data1 Oct 2026US 2026/0299063 A1Siemens Healthineers AG
- Patient table and magnetic resonance imaging apparatus1 Oct 2026US 2026/0299064 A1FUJIFILM Corporation
- Wireless coils, magnetic resonance imaging systems including the same, and control methods for the magnetic resonance imaging24 Sep 2026US 2026/0287692 A1Shanghai United Imaging Healthcare Co., Ltd.
- Nuclear quadrupole resonance spectrometer24 Sep 2026US 2026/0287694 A1Centre National De La Recherche Scientifique
Most cited
By later US patents
- Methods for in vivo magnetic resonance imaging462US 6,549,800 B1Johns Hopkins Unversity School of Medicine · 2003
- Method of internal magnetic resonance imaging and spectroscopic analysis and associated apparatus268US 5,699,801 AThe Johns Hopkins University · 1997
- Miniature magnetic resonance catheter coils and related methods234US 6,263,229 B1The Johns Hopkins University School of Medicine · 2001
- Integrated high-frequency generator system utilizing the magnetic field of the target application219US 8,786,284 B2Bridge12 Technologies, Inc. · 2014
- Biopsy and sampling needle antennas for magnetic resonance imaging-guided biopsies218US 7,236,816 B2The Johns Hopkins University · 2007