Did Someone Really Patent This?

 Patent Illustration for a tricycle with built in lawnmower. 

Patent Illustration for a tricycle with built in lawnmower. 

Do you ever have what you think to be a really good idea, but when you share it with someone else, you realize that your idea suddenly doesn't make sense? The above patent illustration, for instance, may seem beneficial. However, when it comes down to it, do you really want your child riding a tricycle with sharp blades attached to it? Read on for more inventions that are seemingly good ideas, but ultimately not very useful!