ALEXANDRIA, Va., June 6 -- United States Patent no. 12,280,242, issued on April 22, was assigned to CAREFUSION 303 INC. (San Diego).

"Multi-chamber syringe" was invented by Todd Oda (Torrance, Calif.), George Mansour (Diamond Bar, Calif.) and Eugene Mason (La Habra Heights, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A syringe includes a syringe body, a first plunger, a second plunger, and an inner tube. The syringe body defines a syringe cavity and a syringe port, wherein the syringe port is in fluid communication with the syringe cavity. The first plunger is disposed within the syringe cavity and defines a first chamber in the syringe cavity, wherein the first chamber is in fluid communication wi...