ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,414,761, issued on Sept. 16, was assigned to Sanulus Medical LLC (Dallas).

"Devices and methods for targeted delivery of a substance" was invented by John S. Pollack (Naperville, Ill.) and William R. Voss (Hinsdale, Ill.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A device for applying a bubble of a substance to a tissue surface, the device comprising a cannula, a distal tip at the distal end portion of the cannula, the distal tip having a bubble support surface and an exit port extending through the bubble support surface, an expansion fluid passageway extending through the cannula to the exit port, a source of an expansion fluid and an actuator th...