Patents by Inventor David C. Cardinal

David C. Cardinal 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 of and apparatus for monitoring platelet aggregation and test cell for use in such method and apparatus
    Patent number: 4319194
    Abstract: Aggregation of blood-platelets is detected by using a test cell which contains two electrodes which extend into the sample. So as to maximize the change in resistance between the electrodes which occurs as platelets aggregate on them, they are each rod-shaped and of not more than about 0.25 mm in diameter. The resistance between the electrodes is detected using an AC signal to avoid polarization effects.The test cell may be constructed so as to be a disposable item.
    Type: Grant
    Filed: October 1, 1979
    Date of Patent: March 9, 1982
    Assignees: Burroughs Wellcome Co., Wellcome Foundation Ltd.
    Inventors: David C. Cardinal, Roderick J. Flower