Suggestive marks, like arbitrary and fanciful marks, are inherently distinctive and readily registrable as trademarks. If at all possible, descriptive terms should not be chosen for any part of trademarks because they are so difficult to protect. A generic term can never be a trademark. Virtually anything capable of indicating source may serve as a trademark. Letters and numbers may be used as marks.
Slogans can function as marks.
A color or combination of colors may function as an indicator of source and be registered as a trademark. Musical notes, and other sounds, have been federally registered as trademarks. However, if other physical arrangements can perform the same functions without sacrificing a functional advantage, the design may be considered nonfunctional. Protectable trade dress includes the shape of the Coke bottle and the colors, architectural design and menus used in a Mexican-style restaurant. Searching Before using a mark or filing for trademark registration, check for possible conflicts with marks currently registered, in use, or for which applications have been filed.