CPC Main Group A42B 3/00 Helmets; Helmet covers ( defence protection helmets F41H1/04) 4 direct subcodes Child Classifications Navigate with arrow keys, Enter to open A42B 3/003 A42B 3/006 A42B 3/04 Parts, details or accessories of helmets A42B 3/32 Collapsible helmets; Helmets made of separable parts