Patents by Inventor Jean P. Roisin

Jean P. Roisin 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 detecting a change of viscosity by measuring a relative slip, in particular for detecting the coagulation rate of blood
    Patent number: 5181415
    Abstract: An apparatus is disclosed for detecting a change of viscosity of a blood sample in time, comprising a drive element and a driven element having respective facing walls which define therebetween a chamber of calibrated volume adapted to receive a blood sample, the driven element being driven in relative rotation by the drive element with a relative slip which depends on the viscosity of the blood which provides coupling between the two elements and means for measuring the relative change of slip.
    Type: Grant
    Filed: July 18, 1991
    Date of Patent: January 26, 1993
    Assignee: Serbio
    Inventors: Daniel Esvan, Jean P. Roisin