Hardware patents are bad too. Even more bad are those that cover both hardware and simulation of hardware in software domain. For example, someone "invented" a

Hardware patents are bad too. Even more bad are those that cover both hardware and simulation of hardware in software domain. For example, someone "invented" a circuit that lets you control an analogue filter parameters in a certain way. Then also was granted patent for a software that mimics behaviour of such circuit. As if someone found a loophole to patent mathematical formulas. Either people that grant patents are dumb or I don't know.