Patents by Inventor Barry C. Blake

Barry C. Blake 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).

  • Apparatus for investigating the condition of a bacteria containing suspension through frequency profile of electrical admittance
    Patent number: 4876504
    Abstract: A method of investigating the condition of biological particles, in particular the fraction of viable cells in a bacteria population involves applying a voltage and monitoring the voltage induced by magnetic induction in a detector coil. The applied voltage is of a variable frequency alternating voltage and is preferably induced in the medium through a drive coil.
    Type: Grant
    Filed: November 9, 1988
    Date of Patent: October 24, 1989
    Assignee: Public Health Laboratory Service Board
    Inventors: Barry C. Blake, David J. Clarke
  • Determining amount of biological material
    Patent number: 4848139
    Abstract: Apparatus for determining the amount of biological material in a fluid medium, typically the concentration of bacteria in a fermentation chamber, has a test cell through which a medium can be passed with bacteria or after bacteria have been removed by filtration. In the test cell a vibratory element is excited to a resonant frequency indicative of density and a comparison of medium density and medium plus bacteria density reveals the bacteria concentration.
    Type: Grant
    Filed: February 1, 1988
    Date of Patent: July 18, 1989
    Assignee: Public Health Laboratory Service Board
    Inventors: Barry C. Blake-Coleman, David J. Clarke