ALEXANDRIA, Va., April 7 -- United States Patent no. 12,594,146, issued on April 7, was assigned to KING SAUD UNIVERSITY (Riyadh, Saudi Arabia).
"Upper expansion orthodontic retainer" was invented by Hana Omar Albalbeesi (Riyadh, Saudi Arabia), Amal Omar Albalbeesi (Riyadh, Saudi Arabia), Wadea Taher Almuaibed (Riyadh, Saudi Arabia) and Essam Ali Al-Bahkali (Riyadh, Saudi Arabia).
According to the abstract* released by the U.S. Patent & Trademark Office: "An orthodontic retainer includes a first material forming a contact surface for the buccal, occlusal, labial, and lingual surfaces of the maxillary teeth. The first material has a number of holes formed bi-laterally in the lingual surface. The orthodontic retainer includes a second mater...