Section 11
SEC. 11. Any person may apply for a license for any addition to or perfection of an invention already patented for a period not greater than that granted for the patent of the original invention, and upon payment of fifty per cent of the fees established in sections four and twenty-one. If the license comes under the provisions of the second paragraph of section four, the tax established therein shall also be paid. However, he shall not be entitled to the exclusive privilege of the addition to or perfection of the invention without first having paid a premium to the inventor of the original, the amount whereof shall be determined by the Court of First Instance of the domicile of the latter or of his legal representative, upon motion of the inventor of the addition or perfection. The provisions of this section shall not be construed to prohibit the original inventor from exploiting the addition or perfection in competition with the inventor of the addition or perfection.