trademark

(noun) a distinctive characteristic or attribute. Synonyms: hallmark, earmark, stylemark.

(noun) a formally registered symbol identifying the manufacturer or distributor of a product.

(verb) mark with a brand or trademark. Synonyms: brand, brandmark. Example: "When this product is not branded it sells for a lower price."

(verb) register the trademark of. Example: "The company trademarked their new gadget."