ALEXANDRIA, Va., April 21 -- United States Patent no. 12,605,855, issued on April 21, was assigned to Khalifa University of Science and Technology (Abu Dhabi, United Arab Emirates).

"Infinite-rotation infinite-stiffness variable stiffness actuator (IRISVSA) with application for compliant supernumerary robotic limb" was invented by Mohammed Ismail Awad (Abu Dhabi, United Arab Emirates), Mohammed Ahmed Ramadan (Abu Dhabi, United Arab Emirates), Basma Bashir Mohamed Hasanen (Abu Dhabi, United Arab Emirates), Irfan Hussain (Abu Dhabi, United Arab Emirates) and Seneviratne Mudigansalage Seneviratne (Abu Dhabi, United Arab Emirates).

According to the abstract* released by the U.S. Patent & Trademark Office: "A supernumerary robotic limb (SRL) s...