Copyright Kids defines all written work as automatically copyrighted until 70 years after the author's death as of 2014. Plagiarism is the automatic claiming of these specific rights in the name of a non-creator by reproduction without acknowledgement, and it is a form of fraud.
Trademarks may persist indefinitely so long as they are still in use and defended, according to the United States Patent and Trademark Office. Failure to continue use or defend a trademark can result in the concept becoming public domain. Trademarks need to be registered in each separate country to help protect the owner's rights. Globally recognised trademarks include Mickey Mouse ears and the golden arches used as a symbol for MacDonald's.