ALEXANDRIA, Va., June 4 -- United States Patent no. 12,318,578, issued on June 3, was assigned to Tandem Diabetes Care Inc. (San Diego).

"System and method for switching between closed loop and open loop control of an ambulatory infusion pump" was invented by Michael J. Rosinko (Anaheim, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An infusion pump system providing therapy to a patient in a closed-loop or semi-closed loop mode can safely automatically revert to open-loop therapy. The system stores a default open-loop basal rate profile in memory. The system also continually tracks the insulin on board for the patient over a plurality of closed-loop therapy intervals. When an error or event occurs re...