Some patents are just ridiculous.
I was watching a documentary the other day. One self-made billionaire showed a touchscreen tablet he made in the 1983. When the reporter asked if he patented it, the guy replied - "No, I don't believe in patents. I think patents make other people disincentivize in coming up with new things."
Now imagine if the first guy who created a fire from a spark patented it. Or the mason who used a keystone in an arc... Fuel your imagination with that idea and picture where we (humans) would be standing now.