10 Medical X-ray apparatus, and accessories thereof, namely, x-ray markers, x-ray marker arrays x-ray phantoms, displays for x-ray images, remote controls for x-ray apparatus; Medical X-ray imaging apparatus, and accessories thereof, namely, x-ray markers, x-ray marker arrays, x-ray phantoms, displays for x-ray images, remote controls for x-ray apparatus; X-ray apparatus for surgical use, and accessories thereof, namely, x-ray markers, x-ray marker arrays, x-ray phantoms, displays for x-ray images, remote controls for x-ray apparatus; Medical X-ray apparatus for diagnostic use, and accessories thereof, namely, x-ray markers, x-ray marker arrays, x-ray phantoms, displays for x-ray images, remote controls for x-ray apparatus; Medical X-ray apparatus for computed tomography scan, and accessories thereof, namely, x-ray markers, x-ray marker arrays, x-ray phantoms, displays for x-ray images, remote controls for x-ray apparatus; X-ray apparatus for fluoroscopy, and accessories thereof, namely, x-ray markers, x-ray marker arrays, x-ray phantoms, displays for x-ray images, remote controls for x-ray apparatus; X-ray apparatus for angiography, and accessories thereof, namely, x-ray markers, x-ray marker arrays, x-ray phantoms, displays for x-ray images, remote controls for x-ray apparatus; X-ray apparatus for intra-operative use, and accessories thereof, namely, X-ray markers, X-ray phantoms, X-ray registration arrays, remote controls for x-ray apparatus; Mobile X-ray apparatus for intra-operative-use, and specific type, namely, x-ray markers, x-ray marker arrays, x-ray phantoms, displays for x-ray images, remote controls for x-ray apparatus; Robots for positioning and holding medical instruments and apparatus; robots for positioning and holding medical X-ray apparatus