Patents Represented by Attorney Salle Ackerman LLC

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  • Detection of magnetic beads using a magnetoresistive device together with ferromagnetic resonance
    Patent number: 7835117
    Abstract: A method and apparatus for detecting the presence of magnetic beads is disclosed. By providing both a static magnetic field and a magnetic field that alternates in the MHz range, or beyond, the bead can be excited into FMR (ferromagnetic resonance). The appearance of the latter is then detected by a magneto-resistive type of sensor. This approach offers several advantages over prior art methods in which the magnetic moment of the bead is detected directly.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: November 16, 2010
    Assignee: Headway Technologies, Inc.
    Inventor: Yuchen Zhou