The link you referenced would generally be considered the far-left stance, in that there really shouldn't be any property ownership at all (the referenced writings seem to suggest that even real property is a menace).
Personally, I think there should be some reward for truly novel invention. I agree with the referenced writings that a peanut butter and jelly sandwich does not qualify for such protection, despite what the Patent Office may do. This is simply an indication of the level of work being done at the Patent Office, however, amongst other structural problems in the system.
I do think that the patent system serves a purpose. For invention that is truly novel, it is worth the price of temporary monopoly to encourage disclosure. Many of the novel drugs on the market today might not exist without patent protection. It is simply too expensive to create a new drug without the promise of a future upside free from the inevitable copycats, who could underprice because they have no R&D expense. While drug companies are not usually considered the good guy due to over-pricing (because of patent monopolies), I think we are better off having the drugs in the long term and suffering the short term consequences of issuing the patent.