(a)For a trademark or service mark - (1)Ownership of prior registration(s). In appropriate cases, ownership of one or more active prior registrations on the Principal Register or under the Trademark Act of 1905 of the same mark may be accepted as prima facie evidence of distinctiveness if the goods or services are sufficiently similar to the goods or services in the application; however, further evidence may be required. (2)Five years substantially exclusive and continuous use in commerce. In appropriate