ALEXANDRIA, Va., June 6 -- United States Patent no. 12,279,874, issued on April 22, was assigned to Nokia Technologies Oy (Espoo, Finland).
"Bio-signal detection" was invented by Antti Salo (Lohja, Finland) and Kim Blomqvist (Espoo, Finland).
According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus comprising: a first displacement current sensor comprising a first sensing electrode and a first guard electrode, wherein the first displacement current sensor is configured to measure a first sensed signal dependent upon electrical activity of a subjects heart; a second displacement current sensor comprising a second sensing electrode and a second guard electrode, wherein the second displacement current sensor i...