The article on patents analyses the history of French and European patent jurisdiction. It explains, why the European parliaments decided in the 60-70s against patentability of computer programs and how French courts supported this decision by some very clear verdicts even against software innovations related to the control of industrial production processes. It also explains how the European Patent Office since 1986 gradually deviated from these clear rules in 5 steps of logic-twisting. It warns however that the patents gratend by the EPO are of incertain value and could be negated by any national judge.