ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,497, issued on Jan. 13, was assigned to PULSE NEEDLEFREE SYSTEMS INC. (Lenexa, Kan.).

"Ball lock assembly with retention pin" was invented by Mikhail Zolotukhin (Shawnee, Kan.).

According to the abstract* released by the U.S. Patent & Trademark Office: "In an aspect, the present invention is directed to a ball lock assembly comprising a retention pin for use with an injection device. The ball lock assembly includes a ball lock frame and a ball lock core housed within the ball lock frame that includes a longitudinal opening within which a portion of the pin is positioned. In other aspect, the present invention is directed to an injection device that includes the ball lock assembly...