ALEXANDRIA, Va., April 15 -- United States Patent no. 12,599,461, issued on April 14, was assigned to Rafat Al Mstrehi (Steinfurt, Germany).
"Impression tray" was invented by Rafat Al Mstrehi (Steinfurt, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to an impression tray for creating a dental impression of at least one tooth, comprising: a base element with a base surface, a first boundary element, and a second boundary element, wherein the first boundary element and the second boundary element are arranged at the base element to form a receiving tray between the first boundary element, the base surface and the second boundary element, that is adapted to receive a first dental ...