I have long wondered about US patents being granted for simple and obvious things.
Did you know that someone has successfully patented cross stitch grids in needlework? The stitch has been done for thousands of years. The grids have been available since Berlin Woolwork was popular in Victorian times. Yet someone was granted a patent:
http://www.freepatentsonline.com/4483265.html
I'd like to that tested in court. Patently silly.