We who invent things, we who solve problems in new ways, don't do so because we can get a patent. We solve the problem because when you put a problem in front of us, we can't stop ourselves from solving it. It haunts us. We dream about it. And the only way to make it go away is to solve it. That's the nature of Engineers, the nature of Inventors. Engineers don't think about patents when presented with a problem, they think about solutions. Lawyers think about patents and they don't invent anything.

You might have a better idea than the last guy, but chances are your idea overlaps with his a little. If your new idea has some similarities with an exiting patented idea, implementing it could be risky. If engineers did a patent search for every idea they had, they would find some overlap with existing patents every single time. Nothing would ever get created. The true evil of patents is that they actually stifle, rather than promote, innovation. The effect of patents is opposite their intent.