ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,472,290, issued on Nov. 18, was assigned to Nikkiso Co. Ltd. (Tokyo).

"Blood purification apparatus" was invented by Takumi Homma (Shizuoka, Japan), Kazuya Tsuji (Shizuoka, Japan), Hikaru Chiaki (Shizuoka, Japan), Yuya Menjoh (Shizuoka, Japan) and Kunihiko Akita (Shizuoka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a blood purification apparatus that returns blood in a blood circuit to a body. A blood purification apparatus includes: a blood circuit and a dialysate circuit coupled to each other through a blood purifier; an air introduction route coupled to the dialysate circuit; an air introducer provided to any of the dialysate ci...