1 . The following provisions in the patent licensing agreements which existed until 1981/82 between WSI and the licensees Ostermann , Shark , Akutec , S.A.N . , Klepper and Marker constituted an infringement of Article 85 ( 1 ) of the EEC Treaty :
1 . the obligation on the licensees to exploit the licensed patents only for the manufacture of sailboards using boards which had been given WSI's prior approval ;
2 . the obligation on the licensees not to supply rigs manufactured under German patent No 19 14 602.4-22 separately and without the boards approved by WSI ;
3 . the obligation on the licensees to pay royalties for rigs manufactured under German patent No 19 14 602.4-22 only on the basis of the net selling price of a complete sailboard ;
4 . the obligation on the licensees to affix to the boards in their range a notice stating that such boards are " licensed by Hoyle Schweitzer " or " licensed by WSI " ;
5 . the obligation on the licensees to acknowledge the word marks " Windsurfer " and " Windsurfing " as well as a design mark showing the abstract shape of a sail ( so-called " logo " ) as valid trade marks .
2 . The provision in the agreements between WSI and Akutec , S.A.N . , Klepper and Marker for termination of the licensing agreements should the licensees start production in a territory not covered by a patent also constituted an infringement of Article 85 ( 1 ) of the EEC Treaty .
3 . Furthermore , the obligation on the licensees , stipulated in the agreements with Ostermann and Shark , not to challenge the licensed patents constituted an infringement of Article 85 ( 1 ) of the EEC Treaty .