How about those awful personalized menus Microsoft gave us starting a few years ago? I always turn them off, they drive me nuts. Once I went poking around the patent database and I saw a patent from Microsoft for that!!
US patent law is absurd. There's some good articles on it by libertarians (I'm a libertarian), which I could dig up, but what it comes down to is, the patent office makes money by selling patents, so it grants patents for everything. In an ideal world there would be no patents anyway because contract law would protect you. But civil law is so wacky now that even though these patents aren't doing anybody any good, companies feel like they at least grant some protection since contract law is so poorly enforced. Then they get carried away with it. But it's like a cold-war detente. If MS ever tried to enforce these patents against IBM, it would be like Moscow shooting nuclear missiles at us, imagine the response.