| http://www.w3.org/ns/prov#value | - U.S. Pat. No. 4,747,405 issued to Leckrone on May 31, 1988, U.S. Pat. No. 4,669,469, issued Jun. 2, 1987 to Gifford, III., et al., and PCT/US 86/02617 application of Leckrone, published Jun. 16, 1988, are each concerned with atherecotomy devices wherein a balloon is used to position an opening in a casing about an obstruction such as plaque.
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