Z:gnu-www-ja-software-patents--0540d9-If it were one patent-one prod/en

If it were one patent-one product, then these patents wouldn't obstruct the development of products because if you developed a new product, it wouldn't be patented by somebody else already. But when one product corresponds to many different ideas combined, it becomes very likely your new product is going to be patented by somebody else already. In fact, there is economic research now showing just how imposing a patent system on a field where there is incremental innovation, can retard progress.