Can someone help me understand the difference. Why is trademark infringment claimed when domain names are similar to registered trademarks, but yet I hear nothing about site content, page titles, which liberally use trademarks? Most every third party site selling manufactured products have content that is filled with registered trademarks. How else would their customers know what they are buying. Since most are not under license with the trademark owners have all these folks ran afoul of the law? What are considered fair uses of register trademarks?
IANAL. Titles aren't granted trademark rights under US trademark law. Star Wars was just the title of a movie, but eventually gained trademark rights when it was also used to sell related merchandise. Site content is probably actionable under copyright. Consult an attorney on it. You don't register trademarks. You use them in commerce or you don't, that's at least what US law says.
A trademark identifies a product as originating from the trademark holder, and a registerd trademark guarantees to the public that they are getting authentic goods or services. A trademark can be registered with the US Patent and Trademark Office, after which if it approved and registered, you then use the symbol (R) after the mark. It does not have to be registered, but if it is not then you don't have the backing of the US Gov't when you go to prosecute your claim to exclusive use. A trademark identifies a specific good or service. It does not identify copy, text, writing, pictures (unless it is a logo for a product) software source code, etc, for which you hold a copyright. These come under the same heading as a book or music - the creator is the owner. You can register a copyright, but don't have to to prove ownership (but it's a good idea). You "own" it as soon as you create it. You don't "own" a trademark however, registration gives you the exclusive right to use it in commerce, and thereby to protect the public so they are sure they are getting "the real thing". You can lose your rights in a trademark by not protecting it and having it fall into common useage (hence the battles that Kleenex(R) and Xerox(R) have fought for decades). Clear as mud. I used to be a trademark atty but it was bad for my health.