Patents by Inventor Michael J. E. Campbell

Michael J. E. Campbell 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).

  • Method and apparatus for determining transpiration characteristics of a permeable membrane
    Patent number: 7219534
    Abstract: A system and method for measuring the transpirational characteristics of a permeable polymeric membrane, particularly polymeric membranes used for bandages. The polymeric membrane is placed against a moisture source. A probe is applied to the other side. Signals from the probe are sampled at a high rate to detect a first transient appearance of moisture on the surface being measured. The interval between the first transient response and a predetermined equilibrium value defines the transpirational characteristics of the polymeric membrane.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: May 22, 2007
    Assignee: Nova Technology Corporation
    Inventor: Michael J. E. Campbell
  • Method and apparatus for monitoring the efficacy of fluid resuscitation
    Patent number: 7195595
    Abstract: Relative Mean Arterial Pressure values are obtained non-invasively using a probe to obtain moisture measurements at a selected site on a subject. A control collects data samples. A converter produces a relative value of Mean Arterial Pressure (MAP) in response to the collected data (DPM) in accordance with a correlation defined by: MAP=(DPM?DPM(0))/K(I).
    Type: Grant
    Filed: May 23, 2005
    Date of Patent: March 27, 2007
    Assignee: Nova Technology Corporation
    Inventors: Geoffrey Ling, Michael J. E. Campbell
  • Method and apparatus for measuring relative hydration of a substrate
    Publication number: 20020161312
    Abstract: A method and apparatus for measuring relative hydration of a substrate. Measurements of the electrical characteristics of the substrate and the force applied to and the temperature of the substrate during the measurement provide inputs for determining such relative hydration of the substrate.
    Type: Application
    Filed: April 4, 2002
    Publication date: October 31, 2002
    Inventors: Michael J. E. Campbell, Michael L. Gallant, Dennis D. Giguere, Thomas B. Horgan, Steven W. Nickson, Richard W. Sheppe
  • Method and apparatus for measuring relative hydration of a substrate
    Patent number: 6370426
    Abstract: A method and apparatus for measuring relative hydration of a substrate. Measurements of the electrical characteristics of the substrate and the force applied to and the temperature of the substrate during the measurement provide inputs for determining such relative hydration of the substrate.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: April 9, 2002
    Assignee: Nova Technology Corporation
    Inventors: Michael J. E. Campbell, Michael L. Gallant, Dennis D. Giguere, Thomas B. Horgan, Steven W. Nickson, Richard W. Sheppe, Jr.