The present invention includes a biopsy needle for use in a biopsy gun or as surgical instrument, capable of taking multiple samples, and a guiding needle holder for holding a biopsy needle. The biopsy needle includes an inner needle, also called a stylet, and an outer needle, also called a cannula,...http://www.google.com/patents/US6110129?utm_source=gb-gplus-sharePatent US6110129 - Biopsy needle and surgical instrument
