Patents by Inventor Trevor Knight

Trevor Knight 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: 9743971
    Abstract: A programmable screw driver and method for affixing screws into bone is disclosed. The screw driver includes a torque sensor for measuring torsional input during screw insertion, a rotational motion sensor for measuring the rotation of the screw driver, and a microprocessor. Once a surgeon rotates a screw to be affixed to the bone, the torque sensor measures the torque and sends this information to the microprocessor. Once a predetermined torque level is attained, the microprocessor begins to measure subsequent rotation of the screw driver until a predetermined rotational limit, thereby causing a signal to be sent to alert the surgeon to stop tightening.
    Type: Grant
    Filed: January 29, 2014
    Date of Patent: August 29, 2017
    Assignee: THE JOHNS HOPKINS UNIVERSITY
    Inventors: Stephen Belkoff, Evan Langdale, Trevor Knight
  • Publication number: 20140222012
    Abstract: A programmable screw driver and method for affixing screws into bone is disclosed. The screw driver includes a torque sensor for measuring torsional input during screw insertion, a rotational motion sensor for measuring the rotation of the screw driver, and a microprocessor. Once a surgeon rotates a screw to be affixed to the bone, the torque sensor measures the torque and sends this information to the microprocessor. Once a predetermined torque level is attained, the microprocessor begins to measure subsequent rotation of the screw driver until a predetermined rotational limit, thereby causing a signal to be sent to alert the surgeon to stop tightening.
    Type: Application
    Filed: January 29, 2014
    Publication date: August 7, 2014
    Applicant: THE JOHNS HOPKINS UNIVERSITY
    Inventors: Stephen Belkoff, Evan Langdale, Trevor Knight
  • Patent number: 5672201
    Abstract: A process for preparing a structured composite pigmentary material comprises forming a dispersion of uncoated particles of titanium dioxide at a pH value at which the particles have a surface charge and subjecting the dispersion to cross-flow filtration until the dispersion contains more than 50% by weight titanium dioxide. The concentrated dispersion is mixed with a dispersion of chemically distinct particles having a surface charge of opposite sign under conditions which ensure that the sign of the surface charge on either of the particulate materials is not reversed. In the resultant composite pigmentary material the titanium dioxide particles are held in association with the chemically distinct particles as a result of said surface charges.
    Type: Grant
    Filed: March 5, 1996
    Date of Patent: September 30, 1997
    Assignee: Tioxide Group Services Limited
    Inventors: Leslie Ainsley Simpson, Keith Robson, David Trevor Knight, Ronald Brown
  • Patent number: 5643974
    Abstract: A process for the production of a structured composite pigmentary material in the form of a dispersion comprises mixing an aqueous dispersion of inorganic pigmentary particles and an aqueous dispersion of polyvinyl chloride (PVC) particles. The inorganic pigment particles carry a positive surface charge and the PVC particles carry a negative surface charge and the particles in the composite are held in association as a result of these charges. The inorganic pigment particles and PVC particles are mixed in the presence of a surfactant system which provides both anionic and steric stabilisation.
    Type: Grant
    Filed: February 6, 1996
    Date of Patent: July 1, 1997
    Assignee: Tioxide Group Services Limited
    Inventors: Leslie Ainsley Simpson, Keith Robson, David Trevor Knight, Martin Alec Williamson