CPC Subgroup
F41H 5/263 Full Title
Armour; Armour plates (processes for manufacturing or treating B21, C21, ) > Peepholes; Windows; (manufacture or composition of glass C03; Covers therefor )
F41H 5/263 Armour; Armour plates (processes for manufacturing or treating B21, C21, ) > Peepholes; Windows; (manufacture or composition of glass C03; Covers therefor )