Commission Regulation (EEC) No 151/93 of 23 December 1992 amending Regulations (EEC) No 417/85, (EEC) No 418/85, (EEC) No 2349/84 and (EEC) No 556/89 on the application of Article 85 (3) of the Treaty to certain categories of specialization agreements, research and development agreements, patent licensing agreements and know-how licensing agreements.