Okla. Stat. tit. 78 § 24
Upon compliance by the applicant with the requirements of this act, the Secretary of State shall cause a certificate of registration to be issued and delivered to the applicant. The certificate of registration shall be issued under the signature of the Secretary of State and the seal of the state, and it shall show the class of goods or services and a description of the goods or services on which the trademark is used, the trademark and its description, the registration date and the term of the registration.
Any certificate of registration issued by the Secretary of State under the provisions hereof or a copy thereof duly certified by the Secretary of State shall be admissible in evidence as competent and sufficient proof of the registration of such trademark in any action or judicial proceedings in any court of this state.
Okla. Stat. tit. 78, § 24