THE INTERNATIONAL PATENT-LEGISLATION AND DEVELOPING COUNTRIES A major concern today in many fields of international cooperation is the development of the nonindustrialized part of the world. This was not always so. Until fairly recently contacts among States were basi cally limited to diplomatic intercourse. The concept of State sovereign ty naturally led to the application of the principle of legal reciprocity between States. In the few areas outside diplomatic relations where international cooperation developed during the last century the same principle of legal reciprocity was applied. The...