ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,141, issued on Jan. 13, was assigned to MEDTRONIC VASCULAR INC. (Santa Rosa, Calif.).

"Tissue-removing catheter including drive assembly" was invented by Aran Murray (Galway, Ireland), Eoin J. Walsh (Galway, Ireland), Thomas P. Hayden (Turloughmore, Ireland) and Martin B. Patten (Westport, Ireland).

According to the abstract* released by the U.S. Patent & Trademark Office: "A tissue-removing catheter includes a drive assembly. The drive assembly includes a gear rotatable about an axis, a gear extension coupled to the gear and extending axially outward from the gear, and a lock received in and coupled to the gear extension. The gear extension is rotatably driven by the gear, and t...