I just watched a pro-pantent video lecture and the guy kept going on how about how alot of inventions would never have happened if not for patents. Personally I don't believe that they encourage development, not sure if they inhibit it, that's what I want to find out.. They most likely do concetrate wealth tho, wich infact can have a possitive affect on highcost research. Anyway, In contrast to the video I'd like to look into to inventions and technologies that never have been patented and what the implications of that fact have been. So.. what inventions(in any field) were never patented?