A medical retrieval device has a multi-prong retrieval assembly. The multi-prong retrieval assembly has a first position, in which the retrieval assembly extends from the distal end of the sheath to form an open ended grasping device, and a second position, in which the retrieval assembly extends from...http://www.google.de/patents/US20040078044?utm_source=gb-gplus-sharePatent US20040078044 - Medical retrieval device
