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4- Catapults or launching apparatus for ship-borne, land- or sea-based aircraft; apparatus for launching aircraft weapons. 5, Barrage balloons. CATEGORY VI Asphyxiating, lethal, toxic or incapacitating substances intended for war purposes, or manufactured in excess of civilian requirements. CATEGORY VII Propellants, explosives, pyrotechnics or liquefied gases destined for the propulsion, explosion, charging or filling of, or for use in connection with, the war material in the present categories, not capable of civilian use or manufactured in excess of civilian requirements.CATEGORY VIII Factory and tool equipment specially designed for the production and maintenance of the material enumerated above and not technically convertible to civilian use. . ANNEX IV. SPECIAL PROVISIONS RELATING TO CERTAIN KINDS OF PROPERTY A. INDUSTRIAL, LITERARY AND ARTISTIC PROPERTY i,— (a) A period of one year from the coming into force of the present Treaty shall be accorded to the Allied and Associated Powers and their nationals without extension fees or other penalty of any sort in order to enable them to accomplish all necessary acts for the obtaining or preserving in Finland of rights in industrial, literary and artistic property which were not capable of accomplishment owing to the existence of a state of war. (b) Allied and Associated Powers or their nationals who had duly applied in the territory of any Allied or Associated Power for a patent or registration of a utility model not earlier than twelve months before the outbreak of the war with Finland or during the war, or for the registration of an industrial design or model or trade mark not earlier than six months before the outbreak of the war with Finland or during the war, shall be entitled within twelve months after the coming into force of the present Treaty to apply for corresponding rights in Finland, with a right of priority based upon the previous filing of the application in the territory of that Allied or Associated Power. (c) Each of the Allied and Associated Powers and its nationals shall be accorded a period of one year from the coming into force of the present Treaty during which they may institute proceedings in Finland against those natural or juridical persons who are alleged illegally to have infringed their rights in industrial, literary or artistic property between the date of the outbreak of the war and the coming into force of the. Treaty. ,2. A period from the outbreak of the war until a date eighteen months after the.coming into force of the present Treaty shall be excluded in determining the time within which a patent must be worked or a design or trade mark used. 3. The period from the outbreak of the war until the coming into force of the present Treaty shall be excluded from the normal term of rights in industrial, literary and artistic property which were in force in Finland at the outbreak of the war or which are recognised or established under part A of this Annex and belong to any of the Allied and Associated Powers or their nationals. Consequently, the normal duration of such rights shall be deemed to be automatically extended in Finland for a further term corresponding to the period so excluded.