Patents and Eminent Domain

mrbill writes "Interesting take on the Eminent Domain case now before the Supreme Court. Could the same logic behind using Eminent Domain to take real property be used to take a Patent? Apparently some states are contemplating taking drug company patents to force lower drug prices." From the article: "Patents are the key to huge drug-company profits. The industry will fight vociferously to protect them. In West Virginia, where the issue came up last summer, industry lawyers warned a legislative advisory council away from proposing such action on patents, claiming it would be unconstitutional. "