A platelet collection device comprising a centrifugal spin-separator container with a cavity having a longitudinal inner surface. A float in the cavity has a base, a platelet collection surface above the base, an outer surface. The float density is below the density of erythrocytes and above the density...http://www.google.se/patents/US7837884?utm_source=gb-gplus-sharePatent US7837884 - Methods and apparatus for isolating platelets from blood
