G01V 3/101
By measuring the impedance of the search coil
Official title: {by measuring the impedance of the search coil; by measuring features of a resonant circuit comprising the search coil (measuring impedance or characteristics derived therefrom G01R27/00, e.g. quality factor G01R27/26)}
G01V3/101 (By measuring the impedance of the search coil) appears on 288 US grants and 194 published applications in this corpus.
Search patents in G01V- Granted patents
- 288
- Published applications
- 194
- Assignees
- 183
- Inventors
- 529
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 7 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 6 | 0 |
| 1981 | 3 | 0 |
| 1982 | 5 | 0 |
| 1983 | 1 | 0 |
| 1984 | 6 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 8 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 10 | 0 |
| 1992 | 3 | 0 |
| 1993 | 6 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 9 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 2 |
| 2002 | 3 | 3 |
| 2003 | 2 | 2 |
| 2004 | 1 | 3 |
| 2005 | 5 | 4 |
| 2006 | 4 | 6 |
| 2007 | 4 | 3 |
| 2008 | 2 | 3 |
| 2009 | 2 | 1 |
| 2010 | 1 | 3 |
| 2011 | 4 | 1 |
| 2012 | 3 | 7 |
| 2013 | 1 | 5 |
| 2014 | 6 | 8 |
| 2015 | 5 | 17 |
| 2016 | 3 | 9 |
| 2017 | 9 | 15 |
| 2018 | 15 | 18 |
| 2019 | 26 | 13 |
| 2020 | 14 | 17 |
| 2021 | 13 | 13 |
| 2022 | 12 | 11 |
| 2023 | 13 | 10 |
| 2024 | 9 | 5 |
| 2025 | 9 | 12 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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Most cited
By later US patents
- Proximity sensing based on antenna impedance variation81US 7,113,087 B1Microsoft Corporation · 2006
- Methods and apparatus employing apparent resonant properties of thin conducting materials80US 4,678,994 ADigital Products Corporation · 1987
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