HOUSTON--(BUSINESS WIRE)--Aggredyne, Inc., a Houston-based biomedical diagnostics company that is defining a new standard for platelet function, has added a fourth patent to its intellectual property portfolio. The new patent, “Systems for Measuring Properties of a Physiologic Fluid Suspension,” provides the foundation to expand the AggreGuideTM platform to other coagulation tests, including heparin, Coumadin® (warfarin) and collagen.