This might be better in Science and Society, but it purports to pertain to physics. You might have noticed an advertising claim posted on internet forums, such as sciforums, for a "magnetic motor" that produces free electricity, a 'perpetual motion' machine. I've always wondered how these people can get away with posting such fraudulent claims. This is likely how; Way back when (1973), a 'Howard Johnson' was able to bamboozle the US Patent Office to issue a patent for his new motor. It was couched in sufficiently ambiguous language, with lots of impressive drawings, that it was awarded patent no 4151431. But in actuality it was for a perpetual motion machine, using 'unknown physics'. Now, fast forward to the present, long after the 'patent' protection has expired. The scammers will sell you those 'patent' drawings and 'instructions' for $50, claiming that you can build your own perpetual motion machine. When you google on that patent number (US Patent 4151431) the top webpage takes you to the scammer website, which includes the patent. Here: http://www.newebmasters.com/freeenergy/4151431-pg1.html This is the proverbial "HoJo Motor" for which they advertise the plans, falsely claiming that you can build the motor yourself and save on your electric bill. What is interesting is, if your curiosity is piqued, you might google on "Hojo motor scam", and if so, the first dozen or so weblinks takes you to another of their numerous scam websites, which falsely says after extensive investigation, they have determined it is not a scam, for example here: http://hojomotorscam.org/ http://consumerreviews.sale1s.com/hojo-motor-review/ http://www.freenergy4u.com/hojo-motor-review http://cbreviewelite.com/hojo-motor/ http://henrikccorlin.hubpages.com/h...agnetic-Motor-Plan-Review-Does-it-Really-Work One has to actually review through lots of the scam-scam websites to find one that is legitimate, exposing the scam, such as here: http://mapawatt.com/2011/11/05/hojo-motor-is-a-scam/ In any event, I thought this was an interesting exercise in how the mind of the modern scam artist works, using modern internet technology to aid the scam. Anyone hear anything further about the Rossi free-energy device? Moderators - Feel free to move this to Science and Society if you wish.