The circumstances in which a trademark is declared invalid are as follows: (1) The registered trademark has obvious defects. (2) registered trademark disputes. (3) Obtaining registration by improper means. Trademarks approved for registration by the Trademark Office are registered trademarks, including commodity trademarks, service trademarks, collective trademarks and certification trademarks; Trademark registrants enjoy the exclusive right to use trademarks and are protected by law.