Patents that should not be are one of the great rent seeking devices of our time.
Reading this lengthy response to a patent infringement claim by Monster Cable against Blue Jeans Cable is a delicious experience. It starts with:
Dear Monster Lawyers,
Let me begin by stating, without equivocation, that I have no interest whatsoever in infringing upon any intellectual property belonging to Monster Cable. Indeed, the less my customers think my products resemble Monster’s, in form or in function, the better.
and gets better and better.