A blood clot filter which is collapsible toward a central longitudinal axis into a collapsed configuration for insertion into a blood vessel and which is radially expandable outwardly from the longitudinal axis to an expanded configuration for contact with the inner wall of the blood vessel at two longitudinal...http://www.google.com/patents/US20050234503?utm_source=gb-gplus-sharePatent US20050234503 - Removeable embolus blood clot filter and filter delivery unit
