Standard Character Mark
A standard character mark is a trademark consisting of letters only - a literal element - without regard to font or any particular style.
A design mark is a trademark consisting of a logo, design, or a specific font in a particular arrangement.
A tradedress is a three-dimensional mark - a particular packaging associated with a company or source of goods. Tradedresses may even apply to the particular shape of a product if it is associable with a particular company, for example.