G01R 33/3671
Involving modulation of the quality factor of the rf coil
Official title: {involving modulation of the quality factor of the RF coil (G01R33/3642 takes precedence)}
G01R33/3671 (Involving modulation of the quality factor of the rf coil) appears on 45 US grants and 39 published applications in this corpus.
Search patents in G01R- Granted patents
- 45
- Published applications
- 39
- Assignees
- 38
- Inventors
- 110
- Latest grant
- 2 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 0 |
| 2004 | 1 | 2 |
| 2005 | 0 | 1 |
| 2006 | 1 | 2 |
| 2007 | 3 | 0 |
| 2008 | 0 | 5 |
| 2009 | 2 | 1 |
| 2010 | 3 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 4 |
| 2016 | 0 | 2 |
| 2017 | 2 | 3 |
| 2018 | 3 | 2 |
| 2019 | 4 | 1 |
| 2020 | 4 | 5 |
| 2021 | 3 | 5 |
| 2022 | 2 | 2 |
| 2023 | 3 | 0 |
| 2024 | 0 | 2 |
| 2025 | 2 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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Most cited
By later US patents
- Nuclear magnetic resonance pulse sequences for use with borehole logging tools181US 5,023,551 ASchlumberger-Doll Research · 1991
- Borehole measurement of NMR characteristics of earth formations141US 5,055,787 ASchlumberger Technology Corporation · 1991
- Borehole measurement of NMR characteristics of earth formations, and interpretations thereof106US 4,933,638 ASchlumber Technology Corporation · 1990
- Borehole measurement of NMR characteristics of earth formations106US 5,055,788 ASchlumberger Technology Corporation · 1991
- Pulse sequences for low field magnetic resonance80US 10,591,561 B2Hyperfine Research, Inc. · 2020