Every now and them I come across patents taken out by famous people. For example:
Jamie Lee Curtis patented ''A disposable infant garment which takes the form of a diaper including, on its outer side, a sealed, but openable, moisture-proof pocket which contains one or more clean-up wipers.''
and
Michael Jackson Patent number 5255452, filed in 1992, shows how Michael Jackson and his dancers could lean at 45-degree angles during live performances of the song ''Smooth Criminal''.
1. A system for engaging shoes with a hitch mans to permit a person standing on a stage surface to lean forwardly beyond his or her center of gravity
Any others?

Germain Greer patented the ''Wonder bra'', or so I have read....
In The Real Frank Zappa Book Frankie boy basically invents iTunes.
Howard Hughes - strapless bra, among many other things.....
les paul - multitrack.
Zeppo Marx - cardiac pulse rate monitor
Edward L. Van Halen - A supporting device for stringed musical instruments, for example, guitars, banjos, mandolins and the like, is disclosed. The supporting device is constructed and arranged for supporting the musical instrument on the player to permit total freedom of the player's hands to play the instrument in a totally new way
Pope john XII - The time machine
Mike Nesmith's mum - liquid paper
Penn Jillette- U.S. Patent 5,920,923 — Hydro-therapeutic stimulator. A spa designed to stimulate a female user with water jets.
my idol hedy lamarr invented the telegraphic thingie
Jeff Goulbloom - Teleportation.
Kirk Pengilly for inventing worst moustache ever!
the rochewrappa! by yours truly, (someguy called) Glen Roche, also invented some other shit
after a little research, Frank Zappa didnt invent the wah wah.
He did however invent musical smugness.
im pretty sure that was beathoven ^
The Guy Who Created Wonder Woman - The polygraph machine.
george foreman - the george foreman grill
Cher - The Vocoder
(according to her, later made look the fool when It was revealed it was actually pitch correction used in that song ''do you beleeiiieeve in liiiv after lorv....after lorv after lorv)
Neil Young has invented various wheelchairs for his disabled son.
Steve Albini invented a silly guitar strap that works like a bit like a belt.
But ZZ top did it better.