Not so fast? Perpetual motion of an object in vacuum is perfectly possible, it's generating extra energy (or perfect vacuum) that is the problem. Even then, on

Not so fast? Perpetual motion of an object in vacuum is perfectly possible, it's generating extra energy (or perfect vacuum) that is the problem. Even then, on a cosmological level there is a hypothesis of dark energy that is exerted by the nature of spacetime itself. On a practical level, there are things like solar/tidal/geothermal energy that are perpetual for any human purposes even if not absolutely. And there are a lot of cases where the initial patent is completely impractical and only derived works come to serve useful purposes. Should an inventor of a clever device only a step away from a useful function be not recognized? I would rather have these than slider lock UI patents.