Beware the patent troll

I hadn't heard of a "patent troll" until last week and in one sense I wish I still hadn't.

For those who don't know, a patent troll is described as "a pejorative term for a person or company that enforces its patents against one or more alleged infringers in a manner considered unduly aggressive or opportunistic, often with no intention to manufacture or market the patented invention."

My research into the numerous different patent trolls swallowed up more than half a day of...