ALEXANDRIA, Va., May 19 -- United States Patent no. 12,631,489, issued on May 19, was assigned to AMAZON TECHNOLOGIES INC. (Seattle).

"Spectroscopic biometric user assessment system" was invented by Evan Perillo (Woodinville, Wash.), Baomin Wang (Herndon, Va.), Abhinav Kashyap (Redmond, Wash.), Brendan Pratt (Bethel, Conn.) and Yufei Jia (Seattle).

According to the abstract* released by the U.S. Patent & Trademark Office: "An input device assesses an object in a field of view using multi-wavelength reflectance spectroscopy to determine if the object is an actual user or an artifact. Light sources are operated to illuminate an object. For example, the object may be illuminated with white, violet, and infrared light simultaneously. A spectr...