Luigi Pirandello (1867-1936) has said: “The history of mankind is the history of ideas”. I have borrowed the headline of my paper from Napoleon Hill (1883-1970). To Hill belongs also the quote that “Ideas are beginning points of all fortunes”. Andrew Carnegie’s (1835-1919) one imparts the same thought: “All achievement, all earned riches, have their beginning in an idea”. It should be self-explanatory that to such ideas should precede definiteness of the aim, the knowledge what to do, full of energy desire for it and in addition to all the foregoing, the means for embodiment(s) of the idea, i.e. by scheme: why to do? - what to do? - how to do? - with what means to do?.Unfortunately in patenting legitimate putting into practice of the concept of ‘inventive idea’, as substantial principle and leading thought of an invention, has not hitherto regarded as needful. Furthermore, as a “crime” against patenting, in international conventions (Paris and European Patent ones) and agreements in patent matters and patent laws of majority countries are lacking heretofore the legal definitions of basic concepts - ‘invention’ and derived directly from it ‘patentable invention’.An ideal patent system features rights that are defined as clearly as the fence around a piece of land (as tangible property). In order to come substantively close to this ideal, having in mind legal certainty and clarity principles, it is needful first of all:·to furnish legal documents with the legal definitions of basic concepts - ‘invention’ and ‘patentable invention’ as the long-awaited and practically irreplaceable information primarily for innovators;·to make patent claims transparent so that innovators can obtain predictable information on boundaries as soon as possible;·to make patent claims and their interpretation clear and unambiguous;·in the light of aforesaid to improve the feasibility of clearance searches.I think that my present message (in a slight degree also reminder) enables to activate necessary steps in reforming the substantial aspects of patent systems.