G01D 5/204
By influencing the mutual induction between two or more coils
Official title: {by influencing the mutual induction between two or more coils (G01D5/22 takes precedence)}
G01D5/204 (By influencing the mutual induction between two or more coils) appears on 1,223 US grants and 1,251 published applications in this corpus.
Search patents in G01D- Granted patents
- 1,223
- Published applications
- 1,251
- Assignees
- 581
- Inventors
- 2,073
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 8 | 0 |
| 1978 | 6 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 6 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 7 | 0 |
| 1988 | 3 | 0 |
| 1989 | 10 | 0 |
| 1990 | 6 | 0 |
| 1991 | 8 | 0 |
| 1992 | 4 | 0 |
| 1993 | 8 | 0 |
| 1994 | 10 | 0 |
| 1995 | 12 | 0 |
| 1996 | 4 | 0 |
| 1997 | 9 | 0 |
| 1998 | 20 | 0 |
| 1999 | 11 | 0 |
| 2000 | 14 | 0 |
| 2001 | 19 | 9 |
| 2002 | 23 | 25 |
| 2003 | 36 | 21 |
| 2004 | 8 | 34 |
| 2005 | 23 | 33 |
| 2006 | 35 | 24 |
| 2007 | 30 | 24 |
| 2008 | 18 | 36 |
| 2009 | 23 | 29 |
| 2010 | 16 | 29 |
| 2011 | 22 | 14 |
| 2012 | 20 | 24 |
| 2013 | 18 | 31 |
| 2014 | 28 | 36 |
| 2015 | 28 | 53 |
| 2016 | 37 | 64 |
| 2017 | 62 | 57 |
| 2018 | 45 | 48 |
| 2019 | 64 | 85 |
| 2020 | 76 | 72 |
| 2021 | 73 | 97 |
| 2022 | 69 | 95 |
| 2023 | 71 | 87 |
| 2024 | 73 | 105 |
| 2025 | 75 | 74 |
| 2026 | 53 | 45 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01D 5/2046By a movable ferromagnetic element356
- G01D 5/2053By a movable non-ferromagnetic conductive element353
- G01D 5/2073By movement of a single coil with respect to two or more302
- G01D 5/2086By movement of two or more coils with respect to two or143
- G01D 5/2066By movement of a single coil with respect to a single other83
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Most cited
By later US patents
- Eddy current error-reduced AC magnetic position measurement system549US 6,172,499 B2Ascension Technology Corporation · 2001
- Miniaturized position sensor having photolithographic coils for tracking a medical probe316US 6,201,387 B1Biosense, Inc. · 2001
- Non-concentricity compensation in position and orientation measurement systems313US 5,307,072 APolhemus Incorporated · 1994
- Object tracking using a single sensor or a pair of sensors303US 6,615,155 B2Super Dimension Ltd. · 2003
- Position sensor251US 6,667,740 B2Synaptics (UK) Limited · 2003