Patents by Inventor Paul Andrew Robertson

Paul Andrew Robertson 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).

  • Sensing apparatus and method for fluid samples using sound waves
    Publication number: 20040025576
    Abstract: PURPOSE: To provide the biosolution sensor enabling a high accuracy and a small size with an SH-SAW device.
    Type: Application
    Filed: September 10, 2003
    Publication date: February 12, 2004
    Inventors: Antony Robert Glauser, Paul Andrew Robertson, Christopher Robin Lowe
  • Magnetic detection of security articles
    Patent number: 5992741
    Abstract: A method for detecting the presence of magnetic elongated particles in a substrate the base material of which has magnetic properties substantially differing from the corresponding magnetic properties of the elongated particles. The elongated particles have such a long and thin form that their demagnetisation factor N is smaller than 1/250, they have a diameter smaller than 30 micrometer and a magnetic saturation field greater than 100 A/m.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: November 30, 1999
    Inventors: Paul Andrew Robertson, John Fisher, Jonathan Burrell, Pierre Doublet