Man, the hours I could waste, or actually not waste...call it research.
This page just lists some patents by celebrities, but it is awesome research fodder for the haunter. Check out Michael Jackson's patent for anti-gravity illusion shoes as used in his Smooth Criminal video and tour. Really cool stuff...I know I will definitely spend some time digging around in the Disney patents at some point.
Here's the elevator patent from the Tower of Terror attraction, for example