G01R 33/0322
Using the faraday or voigt effect
Official title: {using the Faraday or Voigt effect}
G01R33/0322 (Using the faraday or voigt effect) appears on 199 US grants and 101 published applications in this corpus.
Search patents in G01R- Granted patents
- 199
- Published applications
- 101
- Assignees
- 118
- Inventors
- 372
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 7 | 0 |
| 1986 | 8 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 5 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 7 | 0 |
| 1994 | 4 | 0 |
| 1995 | 10 | 0 |
| 1996 | 9 | 0 |
| 1997 | 6 | 0 |
| 1998 | 5 | 0 |
| 1999 | 6 | 0 |
| 2000 | 8 | 0 |
| 2001 | 9 | 1 |
| 2002 | 9 | 3 |
| 2003 | 3 | 3 |
| 2004 | 1 | 3 |
| 2005 | 0 | 1 |
| 2006 | 3 | 4 |
| 2007 | 3 | 1 |
| 2008 | 2 | 2 |
| 2009 | 1 | 2 |
| 2010 | 2 | 4 |
| 2011 | 0 | 7 |
| 2012 | 2 | 5 |
| 2013 | 5 | 1 |
| 2014 | 3 | 5 |
| 2015 | 4 | 6 |
| 2016 | 7 | 5 |
| 2017 | 3 | 3 |
| 2018 | 4 | 6 |
| 2019 | 5 | 2 |
| 2020 | 5 | 8 |
| 2021 | 9 | 8 |
| 2022 | 4 | 9 |
| 2023 | 12 | 3 |
| 2024 | 4 | 6 |
| 2025 | 4 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Magnetic field sensor head and method for manufacturing same15 Jul 2025US 12,360,180 B2Citizen Finedevice Co., Ltd.
- Magneto-optical material and method for producing same1 Oct 2024US 12,105,160 B2Research Institute For Electromagnetic Materials
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- Optical fibre interferometer and method for measuring a magnetic field or an electrical current based on said interferometer15 May 2025US 2025/0155476 A1Exail
- Electrochemical device monitoring30 Jan 2025US 2025/0035677 A1University of Newcastle Upon Tyne
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- Magneto-optical sensor for magnetic field measurement15 Aug 2024US 2024/0272244 A1National Technology & Engineering Solutions of Sandia, LLC
Most cited
By later US patents
- Optical magnetic field sensor employing differently sized transmission lines132US 5,635,830 AMatsushita Electric Industrial Co., Ltd. · 1997
- Methods and apparatus for optically measuring polarization rotation of optical wavefronts using rare earth iron garnets78US 6,534,977 B12003
- Optical fiber system and method for wellhole sensing of magnetic permeability using diffraction effect of faraday rotator67US 7,413,011 B1Schlumberger Technology Corporation · 2008
- Magneto-optic current sensor62US 4,947,107 ASundstrand Corporation · 1990
- Lensless Magneto-optic speed sensor62US 5,719,497 AThe Regents of the University of California · 1998