They're all just geometric shapes that anyone could throw together. Really, you're pretty damn lazy or uninspired if you can't put together a stop sign outline with 2 circles on either side of it!
Here's a few "no name" companies.
http://www.webdesignerdepot.com/2009/03/40-excellent-logos-c...
Don't get me wrong, I'm not claiming that the logos are cultural artifacts of high calibre. But that what they share with such works is actuality. Their creator can get better in ways that everyone who could but doesn't can't.