Okla. Stat. tit. 78, § 78-24: Certificate of registration

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.