Helmets belong to the 9th category in the trademark classification. Category 9 is mainly used for scientific, navigation, surveying, photography, film, optics, weighing tools, measuring tools, signals, inspection (supervision), rescue (rescue) and teaching devices and instruments; processing, switching, transmission, accumulation, regulation Or control electrical devices and instruments; devices for recording, communicating, and reproducing sounds or images; magnetic data carriers, recording disks; optical disks, DVD disks and other digital storage media; mechanical structures of coin-activated devices; cash registers, computing machines , data processing device, computer; computer software; fire extinguishing equipment. .