ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,426,964, issued on Sept. 30, was assigned to Mazor Robotics Ltd. (Caesarea, Israel).

"Time-spaced robotic reference frames" was invented by Aviv Ellman (Caesarea, Israel), Dany Junio (Caesarea, Israel) and Katherine M. Puckett (Louisville, Colo.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A robotic navigation system includes a robot base (140); a robotic arm (144) comprising a proximal portion secured to the robot base, a distal portion movable relative to the proximal portion, and a tracking marker (156) secured to the robotic arm proximate the distal portion; at least one processor; a navigation system including a tracking marker sensor configured...