The International Association (LESI) and the South African Society (LES) found its roots in the original national society founded in the United States of America in 1965.
Since that time national and regional societies have emerged on all continents. Today LESI is the foremost organization in the field of technology licensing. There are today 31 national and regional societies embracing some 10,000 members from 62 different countries. LESI International has been consulted by and is in ongoing contact regarding technology transfer with the United Nations, in particular, regarding the United Nations development programme; the World Intellectual Property organization (WIPO); the European Union; the Organisation for Economic and Commercial Development; the International Chamber of Commerce; and many national Intellectual Property Registries.