Trademarks galore, from Absolut to Zippo, with links to their corporate stories, at History of Branding. Go deeper into the site to read branding quotes ("It is a pretty recognizable brand name. Originally it was 'Jerry's Guide to the World Wide Web' but we settled on 'Yahoo'." - Jerry Yang), famous slogans, including many from the UK (quick: which company trademarked the one-word slogan "Crowdstopper"?), and some useful links.
Hat tip to Likelihood of Confusion.