In a unanimous decision, the U.S. Supreme Court has declared that “abstract ideas” are not patentable. While this decision doesn’t completely eliminate software patents, it does require that such patents rely on “concrete improvements or new designs, not an aggregation of existing steps.” follow link
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U.S. Supreme Court Deals a Blow to Software Patents
Comments about U.S. Supreme Court Deals a Blow to Software Patents
What sometimes gets fuzzy is when an invention involving software is more than just the idea.