| http://www.w3.org/ns/prov#value | - A filter to be placed within a blood vessel to retain blood clots, said filter comprising:a head; a plurality of clips, each of said clips including a pair of first and second adjacent resilient fingers, each finger having a first end and a second end, and a hairpin-shaped piece of wire having a first end and a second end; said second ends of said first and second fingers being connected respectiv
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