I work for a large Intellectual Property law firm. One of the Principals of our firm just pointed out in a firmwide junk e-mail that Michael Jackson was a named inventor on patent 5,255,452.
Slotted heels in a dancer's shoes, that when engaged in a peg in the stage allows the dancer to lean forward beyond their center of gravity.
It can be seen in the video here:
http://www.youtube.com/watch?v=-FqGjYH3GBE ...I like working with Patent/Trademark/Copyright geeks. ;)