Patents Assigned to R & D Systems, Inc.
  • Hematology control composition and methods for its use
    Patent number: 4338564
    Abstract: A control blood platelet preparation containing a population of platelets of known count range, electronic volume and electronic volume size distribution is used to check the threshold setting calibrations of an electronic particle counter. The control preparation preferably contains blood platelets from whole blood taken from animal species which are non-infectious with respect to human hepatitis, ideally animals of the bovine and parcine species.
    Type: Grant
    Filed: November 5, 1980
    Date of Patent: July 6, 1982
    Assignee: R & D Systems, Inc.
    Inventor: David D. Mundschenk
  • Hematology control composition and methods for its use
    Patent number: 4324686
    Abstract: A control blood platelet preparation containing a population of platelets of known count range, electronic volume and electronic volume size distribution is ued to check the threshold setting calibrations of an electronic particle counter. The control preparation preferably contains blood platelets from whole blood taken from animal species which are non-injectious with respect to human hepatitis, ideally animals of the bovine and porcine species.
    Type: Grant
    Filed: June 11, 1979
    Date of Patent: April 13, 1982
    Assignee: R & D Systems, Inc.
    Inventor: David D. Mundschenk