Maryland Code, Real Property § 13-204

(a)(1) The Commissioner has custody of and shall maintain all records relating to the application for and issuance of patents. For this purpose, the Commissioner may require the clerk of any court to produce, at the expense of the Commissioner, true copies of any land records maintained by that clerk.

(2) On request of any person, the Commissioner shall certify a copy of any land patent record he maintains.

(3) The Commissioner shall provide for the preservation, indexing, filming, and publication of the patent records in his custody.