A great article that explains why "intellectual property" is not really property, because nobody really owns an idea. This is why both the patent and copyright laws only gave "limited time" ownership to the creators. Well, we can't really say that's true for copyright now with life+70 years terms + adding another 20 year extension everytime it's about to expire. I like this quote:

'Property rights arose to grapple with natural scarcity; “intellectual property” rights were invented to create scarcity where it does not naturally exist.'