he patented a new type of reinforced concrete ribbed ceiling and published the first paper on armored concrete named ""contribution to the theory of reinforced armored pillars"". he published the second paper on the same subject based on new results in 1906. in 1908, he published a paper titled ""on membranes of same opposition"" in which he proves that the ideal shape for a water reservoir of equally thick walls is that of a drop of water. his six patents were officially recognized and his reputation in the profession was enormous, bringing abundant financial wealth.