Because the design of graphic trademarks needs creative intellectual labor, when it reaches a certain creative height, graphic trademarks can become works in the sense of copyright law. At this point, the original author can register the copyright of the graphic trademark to prevent others from stealing it.

Applying for a trademark shall not infringe upon the prior rights of others, including copyright. That is to say, if you register the copyright, anyone else must obtain the permission of the right holder to use the logo, including using it on a registered trademark, otherwise it will be infringement. Therefore, after the trademark is registered with copyright, it has played a variety of protective roles.