How to invent a better screw – “The screw is so simple and cheap–most cost less than a penny apiece to make–that it has been easier to design around its deficiencies than to come up with a better model. But LeVey, 40, says he was “too dumb”to listen to naysayers; with his name on 19 patents and with 18 more pending, he thought it was silly to keep working around the problem when he could try making a better screw. ”