16617 ⎘
Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents; Prostheses not implantable in the body having spring elements; Helical springs, e.g. having at least one helical spring; Multiple spring systems including two or more helical springs Concentric outer and inner helical springs