CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
Composition of materials for coverings or clothing affording protection against harmful chemical agents
A62D 7/00
Composition of materials for transparent parts of gas-masks, respirators, breathing bags, or helmets
A62D 7/02
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Clear-view sheets which prevent the formation of water drops or ice (materials for minimising adherence of ice or water to surfaces Fulltext... Hierarchy... Expanded...C09K 3/18)