From what I recall, the original institution of copyright had to do with restricting access to printing presses, not fostering creation. I know this was in an Ars Technica article, but now I can't find it... Patents also had less to do with encouraging innovation than with encouraging
openness in innovation, since previously you had secretive engineers, inventors, and guilds jealously guarding their designs and inventions.
It should be noted that while innovations existed for tens of thousands of years (from the plow to the printing press, it was all done without patents), innovations that had a noticeable economic impact were completely absent from history until the invention of the powered loom. All prior inventions completely failed to raise the standard of living because any benefits would be offset by a rise in the population. Prior to the powered loom, humanity always lived at the Malthusian level or at a slightly better level due to local demographics and politics. The compass might have been great at letting the right have pepper with their salt but it didn't do bugger all for 99.99% of the population.
Starting with the powered loom and with the vast majority of the living standard raising technologies afterwards, some form of entry barrier be it patents or jealously guarded secrets, allowed the owners to earn some sort of benefit for their work even if nothing more then a government salary. In fact it was rare enough for an inventor of an standard of living raising device to not earn a benefit for their invention that the exceptions to the rule (like the cotton gin) are remembered for being exceptions.
What? Believe it or not, Malthus' theories were batshit insane and dead wrong. People do not and have never actually reproduced to the point where meaningful amounts of the population are starving, and as early as ancient Rome you had populations that were fed almost entirely with imported grains carried by ship. Of course, if something fucks up somewhere, and the food doesn't show up, then people start starving, but technology has consistently improved the quality of life by making it more stable and enabling larger populations not devoted to food production. The industrial revolution is possibly the first time where quality of life decreased with advancing technology, even though it was only for a few decades before things stabilized and started going uphill again.