Any inventor of a drawing or a design, or those who have rights thereto, shall alone have the right of usufruct thereto, and to sell, or offer it for sale, and to authorize its sale, provided that such drawing or design is, previously filed.

The Drawings and designs which contain the two advantages of being new and invented, that is, they include external characteristics to make them of special form which differentiates them from known drawings and designs may be filed.