Invention is subject to Patent Law no. 64/1991. As a result of his activity, if the conditions required by law, the inventor receives a patent. For like to create a technique to be declared invention it must meet following conditions: is new, is the result of an inventive step and have industrial application. In connection with first condition, we present some significant cases and reviews of rigor.. Failure patenting an invention of the author's fault is the main cause ignorance of Patent Low having bad track. .Situations analyzed represent colors look the same, namely, that the inventor need to patent his invention and only then you can to popularize by different means which have access.