Artificial intelligence is increasingly an important tool in industry. Not just in computer science but in almost all fields of industry. And where an AI innovation provides a benefit to users, many would like to protect it with a patent. The European Patent Office (EPO) recognises this. In 2017 the EPO published a study on the ‘Fourth Industrial Revolution’ that identified AI as a key enabling technology. As we reported previously, the EPO has held a conference discussing the patentability of AI. And the EPO has recently announced that their Berlin branch is to become a centre of expertise in AI. So it is worth looking at how AI inventions can be patented in Europe.