The modern French patent system was created during the Revolution in 1791. Patents were granted without examination since inventor's right was considered as a natural one. Patent costs were very high (from 500 to 1500 francs). Importation patents protected new devices coming from foreign countries. The patent law was revised in 1844 - patent cost was lowered and importation patents were abolished. The revision saw the introduction of the "Breveté SGDG", which excluded any guarantees that the patented item would actually satisfy its specification.