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  "abstract": "A tracking device that is mountable to a robot, the tracking device has a plurality of faces that contain marking indicia thereon that is used by an imaging apparatus to track the position of a robot. The robot is not required to be at a fixed location, and may have mobility features, such as drives that move the robot along a path of travel, surface, or in space. The tracking devices do not consume or require power to operate. A plurality of tracking devices may be installed on a robot and an imaging apparatus is used to image the field of view in which the robot operates. Discrete locations of the robot in real time or any point in time are ascertained through the positioning of the tracking device. Tracking devices may be installed on robots used for assembly or defect monitoring.",
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  "title": "Robot tracking device",
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