https://patentscope.wipo.int/search/fr/detail.jsf?docId=WO2016022665&recNum=1&office=&queryString=FP%3A%28markus+david%29+&prevFilter=&sortOption=Date+de+pub.+antichronologique&maxRec=1330 WOW Names of Hayes + Markus + Back + Coopervision