ALEXANDRIA, Va., Feb. 26 -- United States Patent no. 12,232,833, issued on Feb. 25, was assigned to RIVERFIELD INC. (Tokyo).

"Surgical robot system, external force estimation device, and computer readable storage medium" was invented by Daisuke Haraguchi (Tokyo), Kotaro Tadano (Tokyo) and Koki Aizawa (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A surgical robot system includes a surgical instrument including a shaft to be inserted through a trocar placed in a subject, an arm device that holds the surgical instrument and moves the surgical instrument with respect to the subject, a detector arranged at the arm device and configured to detect values of forces and torques acting on the surgical instrume...