Article 1369: Form of the treaty governing the exclusive right to an invention, a useful model or industrial model, and the State registration of the transfer of the exclusive right, its pledge and before Abandoning the right to use an invention, a useful model or an industrial design

1. A patent disposition contract, a licence contract, other contracts by which the exclusive right of invention, a useful model or an industrial model is governed, 2. A failure to comply with a written form results in the invalidity of the contract. 2. The exclusion and security of the exclusive right to an invention, a useful model or an industrial model the right to use them under a treaty is subject to State registration in accordance with the procedure laid down in article 1232 of the present Code.