Should the Patent and Trademark Office Be Allowed to Change Its Mind?

A patent on one-click checkout? On a method for exercising a cat? On a lawn bag that looks like a jack o’lantern? On a scheme for hedging risk? Everyone (well, at least everyone in my world of intellectual property law) has a favorite example of a low-quality patent—patents that are too vague, too broad, or too obvious to deserve protection.

http://slate.me/2sqKmDp