difference between design and word mark
Logotype/Wordmark - A logotype, commonly known in the design industry as a word mark, incorporates your company or brand name into a uniquely styled type font treatment. Type fonts come in thousands of possible variations, shapes, sizes, and styles, each conveying a slightly different impression upon your intended audience.
First of all, each registered Trademark in the US only covers either a word mark or a logo/design mark, one registration does not cover both. The logo/design may include the words in the logo/design or not. Read through the description, as Heather Balmat indicated.