Not every idea at the patent office is a winner.  Here are a few examples we've found around the net where necessity wasn't exactly the mother of invention.

They Speak for Themselves

The Air-Conditioned Shirt

The Watermelon of the Future

The Inflatable Pub

Fake Sky

New Uses for Heat Reactive Ink

Pierced Eyeglasses

The Shake Up of Wake Up

Snap and Dine

Cool Inventions

Rotating Skyscraper

Transforming Sofa

Rapex

Computer Ball

Aptera