Patents by Inventor David William Roberts

David William Roberts 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).

  • System and method for calibration for image-guided surgery
    Patent number: 9052384
    Abstract: A method of calibrating a transformation of ultrasound data in an imaging system from a first coordinate system into a second coordinate system, the method including applying a transformation having parameters. The parameters are calibrated by imaging a planar object, extracting points corresponding to ultrasound rays intersecting the planar object, and fitting the parameters such that the points when transformed by the transformation describe a planar surface in the second coordinate system.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: June 9, 2015
    Assignee: The Trustees of Dartmouth College
    Inventors: Alexander Hartov, Keith D. Paulsen, David William Roberts
  • System And Method For Calibration For Image-Guided Surgery
    Publication number: 20110153254
    Abstract: A method of calibrating a transformation of ultrasound data in an imaging system from a first coordinate system into a second coordinate system, the method comprising applying a transformation having parameters. The parameters are calibrated by imaging a planar object, extracting points corresponding to ultrasound rays intersecting the planar object, and fitting the parameters such that the points when transformed by the transformation describe a planar surface in the second coordinate system.
    Type: Application
    Filed: May 22, 2009
    Publication date: June 23, 2011
    Inventors: Alexander Hartov, Keith D. Paulsen, David William Roberts
  • Fabric-softening compositions
    Patent number: 4071456
    Abstract: A fabric-softening composition comprises a dispersing agent, in particular a detergent-active compound, and a sultone of from 14 to 30 carbon atoms of the structure ##STR1## in which each of R.sub.1 and R.sub.2 is H or an aliphatic hydrocarbon radical having a chain of from 1 to 27 carbon atoms, at least one of R.sub.1 and R.sub.2 has a chain of at least 10 carbon atoms, and n is 1 or 2. Fabrics are softened by treatment with such a composition in the form of a dilute aqueous dispersion.
    Type: Grant
    Filed: November 6, 1974
    Date of Patent: January 31, 1978
    Assignee: Lever Brothers Company
    Inventors: Thomas McGee, David William Roberts