The initial queries helped orient the machine-learning system to find prior art on perpetual motion. There’s quite a bit, but ...

Conservation of energy isn’t just a good idea: It is the law. In particular, it is the first law of thermodynamics. But, apparently, a lot of people don’t really get that because history is ...

That the possibility of a perpetual motion machine has not been entirely given ... An endless band or chain is arranged to mesh with two sprocket wheels. The band carries a series of cups, or ...