Bone marrow biopsy devices, assemblies and methods are provided for extracting bone marrow tissue samples. The assemblies include an outer cannula or biopsy needle and a biopsy extractor sized for insertion into the proximal end of the outer cannula. The biopsy needle includes a tapered portion at the...http://www.google.es/patents/US6416484?utm_source=gb-gplus-sharePatente US6416484 - Biopsy extractor
