Haw. Rev. Stat. § 482-28.5
(a) Any person claiming to be the owner of a trademark or service mark for which a certificate of registration has been issued to another person pursuant to this part may file a verified petition in the office of the director for the revocation of the registration of the mark on the basis that:
(6) The registered mark is so similar, as to be likely to cause confusion or mistake or to deceive, to a mark registered by another person in the United States Patent and Trademark Office prior to the date of filing the application for registration under this part; provided that if a registrant proves that the registrant is the owner of a concurrent registration of a mark registered in the United States Patent and Trademark Office that covers an area including this State, the registration shall not be revoked for such an area.
The petition shall set forth facts in support of the petitioner's ownership of the mark and the claim for revocation.
[L 2003, c 124, §4]