ALEXANDRIA, Va., Dec. 31 -- United States Patent no. 12,508,392, issued on Dec. 30, was assigned to DRAGERWERK AG & Co. KGAA (Lubeck, Germany).
"Anesthetic dispensing device and process for setting an anesthetic concentration" was invented by Uwe Bartels (Lubeck, Germany) and Norbert Wruck (Lubeck, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "An anesthetic dispensing device includes a first gas branch carrying breathing gas through an anesthetic evaporator to a mixer unit. A second gas branch carries breathing gas to the mixer unit. A proportional valve in the second gas branch receives a valve control signal to set a valve opening. A control unit determines a first gas branch flow and a second gas...