Comment Cold Fusion isn't like Perpetual Motion (Score 1) 986
Perpetual Motion violates the laws of physics - can't be done, so any patent application is bogus, either wrong or fraudulent, not worth wasting time on.*
Cold Fusion might or might not be possible - the scientific community at large hasn't seen a valid description of the physics or chemistry, and without somebody understanding the science, it's extremely unlikely that they'll engineer a successful implementation by tinkering around, and unlikely that somebody who's keeping the science a "trade secret" has actually done real science, as opposed to waving their hands around in ways that seem pleasing to their scientifically untrained eye, and the mere fact that they haven't blown themselves up isn't proof that it works.
* ("Free energy" is a different case - it usually refers to quackery, but sometimes is used to refer to things like taking advantage of heat differences in the ocean or earth or other things that you might be able to engineer usefully into a long-term economically viable power source, but probably can't.)