No person, firm, association or corporation shall engage in the private detective business or as a private detective or investigator or advertise his or its business to be a private detective business or that of a detective agency or investigator without having first obtained from the superintendent a license to conduct such business, as hereinafter provided. Any person, firm, association or corporation who shall violate any of the provisions of this section shall be guilty of a misdemeanor.
N.J.S. § 45:19-10