Patents by Inventor Russell Paul Cowburn

Russell Paul Cowburn 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: 7502244
    Abstract: A data storage device for storing digital information in a readable form is described made up of one or more memory elements, each memory element comprising a planar magnetic conduit capable of sustaining and propagating a magnetic domain wall formed into a continuous propagation track. Each continuous track is provided with at least one and preferably a large number of inversion nodes whereat the magnetization direction of a domain wall propagating along the conduit under action of a suitable applied field, such as a rotating magnetic field, is changed.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: March 10, 2009
    Assignee: Eastgate Investments Limited
    Inventor: Russell Paul Cowburn
  • Publication number: 20090016535
    Abstract: A method can be provided for performing encryption using a fuzzy key. The method can comprise generating a message, dividing a fuzzy key into a plurality of blocks; and generating an encrypted message by selecting a block from the fuzzy key corresponding to a bit position or bit pattern in the message.
    Type: Application
    Filed: June 13, 2008
    Publication date: January 15, 2009
    Applicant: INGENIA HOLDINGS (UK) LIMITED
    Inventor: Russell Paul Cowburn
  • Publication number: 20080294900
    Abstract: A digital signature is obtained by digitising a set of data points obtained by scanning a coherent beam over a paper, cardboard or other article, and measuring the scatter. A thumbnail digital signature is also determined by digitising an amplitude spectrum of a Fourier transform of the set of data points. A database of digital signatures and their thumbnails can thus be built up. The authenticity of an article can later be verified by re-scanning the article to determine its digital signature and thumbnail, and then searching the database for a match. Searching is done on the basis of the Fourier transform thumbnail to improve search speed. Speed is improved, since, in a pseudo-random bit sequence, any bit shift only affects the phase spectrum, and not the amplitude spectrum of a Fourier transform represented in polar coordinates.
    Type: Application
    Filed: July 29, 2005
    Publication date: November 27, 2008
    Applicant: INGENIA TECHNOLOGY LIMITED
    Inventor: Russell Paul Cowburn
  • Publication number: 20080278998
    Abstract: A serial magnetic mass storage device and associated data storage method is provided based on magnetic nanowires that support single magnetic domains separated by domain walls. Each data-storing nanowire has a plurality of crossing nanowires along its length, forming cross junctions that constitute domain wall pinning sites. Data is fed through each data-storing nanowire by moving the magnetic domains under the action of a field that alternates between alignment and anti-alignment with the crossing nanowires. The data is encoded in the chirality of the domain walls, with up and down chirality transverse domain walls being used to encode 0's and 1's. Data is clocked into each nanowire with suitable nucleation generators capable of nucleating domains with domain walls of pre-defined chirality. Data is clocked out of each nanowire with suitable magnetic field sensors that sense the chirality.
    Type: Application
    Filed: April 18, 2008
    Publication date: November 13, 2008
    Applicant: INGENIA HOLDINGS (UK) LIMITED
    Inventors: Russell Paul Cowburn, Dorothee Petit, Dan Read
  • Publication number: 20080260199
    Abstract: A method and apparatus for determining a class signature from an article made of paper or cardboard in order to identify a generic type of class to which the article belongs. An optical beam illuminates the article and a detector arrangement collects data points from light scattered from many different parts of the article as the article is scanned by the beam. The class signature derives from intrinsic properties imparted to the paper/cardboard during manufacture by, it is believed, the screen used during dewatering of paper pulp. Detection of the class signature allows the manufacturer or the particular paper making machine that made the paper to be identified.
    Type: Application
    Filed: July 29, 2005
    Publication date: October 23, 2008
    Applicant: Ingenia Technology Limited
    Inventor: Russell Paul Cowburn
  • Patent number: 6867988
    Abstract: A magnetic logic element for a logic device is described formed by at least one conduit capable of sustaining and propagating a magnetic soliton, the conduit being adapted by the provision of nodes and/or directional changes giving rise to discontinuities in soliton propagation energy as a result of which logical functions may be processed. Magnetic logic devices such as interconnects and gates, and magnetic logic circuits incorporating such devices and suitable operational fields, are also described.
    Type: Grant
    Filed: November 19, 2001
    Date of Patent: March 15, 2005
    Assignee: Eastgate Investment Limited
    Inventor: Russell Paul Cowburn
  • Publication number: 20040027899
    Abstract: A magnetic logic element for a logic device is described formed by at least one conduit capable of sustaining and propagating a magnetic soliton, the conduit being adapted by the provision of nodes and/or directional changes giving rise to discontinuities in soliton propagation energy as a result of which logical functions may be processed. Magnetic logic devices such as interconnects and gates, and magnetic logic circuits incorporating such devices and suitable operational fields, are also described.
    Type: Application
    Filed: May 16, 2003
    Publication date: February 12, 2004
    Inventor: Russell Paul Cowburn