The legal notions of transformation and conversion have been regulated for the first time in the Romanian system of law through Law No.350/2007 on the models of utility.Both notions are applicable to inventions and models of utility, but not to other types of industrial creations. Due to the fact that these legal concepts have been relatively recently regulated within our legal system, the authors found it necessary to defer to public debate their answers to some legal issues arisen in the process of analyzing the two concepts, also sharing the belief that their own opinions may at some point be completed, or modified by others, rigorously motivated.