Well, I think I don't have to tell you here that patents are some sort of exclusive right related to inventions. Only inventions are eligible to be patented. Some of them, to be more precise.
But mere inventions, taken by themselves, are quite worthless for the society.
They might be seen as some sort of raw material for breeding innovation which means that changes happen in the real world. Innovation is a change in the thought process for doing something or "new stuff that is made useful", as Wikipedia puts it. Patents seen as a legal instrument to assist in doing the administration of the benefits of inventions can make sense only if a sufficient fraction of those inventions make their way into real innovation.
Producing inventions is one thing, transforming them into innovation is quite another. Not all inventions turn out to be fit for innovation. Time has to tell.
However, experience suggests that in many, if not in most or even all cases, real innovation is a double-edged sword: Wherever and whenever innovation occurs, there will not only be winners but also victims: The representatives of Old School (or Ancien Regime as I would like to name it) who insist on doing it traditionally as it ever was done before the advent of the specific invention in question. In this context, think of Schumpeter's concept of creative destruction as a necessary attribute of a dynamic capitalism which is fit to survive its crisis. As brutal as it sounds, allowing victimisation of endangered members of the class of proponents of Old School by not bailing them out by means of new regulations might well be a necessary prerequisite for sustainably saving our capitalist system of economy.