Apple Seeks to Add Six More Samsung Devices to Lawsuit

Well, speaking of common words being trademarked (not patented, you can't patent words) Apple just bought the rights to the word "Lightning" from Harley Davidson. I assume they bought the rights to the term "Thunderbolt" a while ago. God knows they have a trademark now on "Retina".

I /assume/ those trademarks are only valid within the same category of products. I could, say, make a line of....I don't know, cookware, and use the term Lightning with impunity.