Patents by Inventor Nesco M. Lettsome

Nesco M. Lettsome has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7262597
    Abstract: A scanning microscope for high resolution current imaging by direct magnetic field sensing of a sample maintained in an ambient environment. The scanning microscope uses a magnetic sensor such as a SQUID and a fiber probe magnetically coupled between the SQUID sensor and the sample under study. The fiber probe has a sharply defined tip for high resolution probing and for reaching minute cavities on the surface of the sample. The coupling between the tip of the fiber probe and the sample is controlled by a distance control mechanism, in the range of 1-100 nm. The material of the fiber probe with high permeability and low magnetic noise is chosen to optimize flux transmission to the magnetic sensor. Magnetic coupling to the sensor is maximized by keeping the distance between the end of the fiber probe and the sensor to approximately 0-100 ?m. The fiber probe is integrated into the fiber holder for easy replacement of the fiber probe.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: August 28, 2007
    Assignee: Neocera, LLC
    Inventors: Solomon I. Woods, Lee A. Knauss, Nesco M. Lettsome, Alfred B. Cawthorne, Thirumalai Venkatesan