After all, who in his right mind would seek a lousy old patent offering a mere 20 years of protection when copyright can provide monopoly rights for up to 70 years after the author's death?
The result of the abuse the monopolyright, which will harm to the public interest and lead to decrease of whole social efficiency, is conflicted with the original intention of the IP law.
For patent is a kind of legal monopolyright, its monopoly right is easy to be used to restrict competition, and brings to many restricting clauses into patent licensing contracts.