A catheter having an elongated shaft having at least a section which is multilayered with a first layer and a second layer secured to the first layer, and a mandrel having at least a section between the first and second layers. In one presently preferred embodiment, the mandrel is in contact with an...http://www.google.ca/patents/US6837870?utm_source=gb-gplus-sharePatent US6837870 - Catheter having a multilayered shaft section with a reinforcing mandrel
