The Patent and Trademark Office registers both attorneys at law and persons who are not attorneys at law. The former persons are now referred to as “patent attorneys” and the latter persons are referred to as “patent agents.” Insofar as the work of preparing an application for a patent and conducting the prosecution in the Patent and Trademark Office is concerned, patent agents are usually just as well qualified as patent attorneys, although patent agents cannot conduct patent litigation in the courts or perform various services which the local jurisdiction considers as practicing law. For example, a patent agent could not draw up a contract relating to a patent, such as an assignment
or a license
, if the state in which he/she resides.