ALEXANDRIA, Va., April 15 -- United States Patent no. 12,601,712, issued on April 14, was assigned to SENSOCURE AS (Skoppum, Norway).

"Sensor" was invented by Stein Ivar Hansen (Skoppum, Norway).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention provides a physiological sensing device for the measurement of pCO2, the device comprising: (i) a closed chamber bounded, at least partially, by a carbon dioxide permeable membrane; and (ii) at least two electrodes within said chamber, wherein said chamber contains a substantially electrolyte-free liquid in contact with the electrodes and the membrane and wherein the liquid comprises at least one metal or metalloid ion."

The patent was filed on Jan. 6, 2020...