The best of the mainstream arguments against software patents has always been: What does Intellectual Property and Copyright not cover that patents do when it comes to software?
I only have a few friends I trust on such a topic, and my understanding is between IP and Copyright laws from them (ones a public policy researcher, the other a lawyer), it would be more than sufficient for protecting companies work and patents were lobbied only because their enforcement is more heavy handed, IE, it can stifle competition under the guise of "patent infringement"
I only have a few friends I trust on such a topic, and my understanding is between IP and Copyright laws from them (ones a public policy researcher, the other a lawyer), it would be more than sufficient for protecting companies work and patents were lobbied only because their enforcement is more heavy handed, IE, it can stifle competition under the guise of "patent infringement"