Search advertising powerhouse Google (Quote, Chart) suffered a setback Wednesday in its defense of a trademark infringement suit.U.S. District Judge Jeremy Fogel dismissed one claim by American Blind & Wallpaper Factory, but denied Google’s motion to dismiss the suit, allowing it to go forward for trial.American Blind sued Google in May 2004 for trademark infringement in a beef over Google’s lucrative AdWords search advertising service. Google started the spat by asking the court to rule on whether AdWords infringed on American Blind’s trademarks following a series of nasty letters from the home decor retailer. American Blind countersued. For more on this visit here