Mass. Gen. Laws ch. 98, § 13

The deputy director shall prescribe rules and regulations governing the manufacture and sale of clinical thermometers and may require representative samples of any clinical thermometer to be submitted by the manufacturer to the deputy director and approved by him. Clinical thermometers shall be marked with the name, initials or trade mark of the manufacturer. The deputy director may revoke the authority given by him to any manufacturer under the provisions of this section upon proof that the prescribed rules and regulations have not been complied with.