The present invention relates to a guidewire which comprises an elongated core of a substantially solid cross-section having a distal end portion, the distal end portion having a plurality of notches therein, the notches having a depth of 5-25% of the diameter of the proximal end. The proximal end...http://www.google.com/patents/US5746701?utm_source=gb-gplus-sharePatent US5746701 - Guidewire with non-tapered tip
