ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,544,535, issued on Feb. 10, was assigned to SHELVERTON HOLDINGS PTY LTD (Upper Kedron, Australia).

"Catheter" was invented by Barry Doyle (Jolimont, Australia), Lachlan Kelsey (Cottesloe, Australia) and Caroline Shelverton (Queensland, Australia).

According to the abstract* released by the U.S. Patent & Trademark Office: "A catheter for insertion into a vessel of a subject, the catheter including an elongate body extending between a proximal end configured to be attached to a hub and a distal end configured to be inserted into the vessel of the subject, the body having, a tip portion at the distal end, the tip portion having an external tapered profile and including an outlet and a l...