ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,440,140, issued on Oct. 14, was assigned to California Institute of Technology (Pasadena, Calif.).

"Inductive damping brain sensor" was invented by Yu-Chong Tai (Pasadena, Calif.) and Shane S. Shahrestani (Yorba Linda, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Medical diagnostic devices and related methods of use are described in which one or multiple coils in a sensor, each coil connected with an RLC circuit and frequency counter, are held against a patient's head at predetermined cranial locations. Frequencies of the RLC circuit are measured and compared against those taken from known, control heads, to determine whether there is a medical...