388
Opinion of the Court
"The duty of interpreting letters-patent has been committed to the courts. A patent is a legal instrument, to be construed, like other legal instruments, according to its tenor. . . . Where technical terms are used, or where the qualities of substances or operations mentioned or any similar data necessary to the comprehension of the language of the patent are unknown to the judge, the testimony of witnesses may be received upon these subjects, and any other means of information be employed. But in the actual interpretation of the patent the court proceeds upon its own responsibility, as an arbiter of the law, giving to the patent its true and final character and force." 2 W. Robinson, Law of Patents § 732, pp. 481-483 (1890) (emphasis added; footnotes omitted).
In sum, neither Bischoff nor Tucker indicates that juries resolved the meaning of terms of art in construing a patent, and neither case undercuts Justice Curtis's authority.
B
Where history and precedent provide no clear answers, functional considerations also play their part in the choice between judge and jury to define terms of art. We said in Miller v. Fenton, 474 U. S. 104, 114 (1985), that when an issue "falls somewhere between a pristine legal standard and a simple historical fact, the fact/law distinction at times has turned on a determination that, as a matter of the sound administration of justice, one judicial actor is better positioned than another to decide the issue in question." So it turns out here, for judges, not juries, are the better suited to find the acquired meaning of patent terms.
The construction of written instruments is one of those things that judges often do and are likely to do better than jurors unburdened by training in exegesis. Patent construction in particular "is a special occupation, requiring, like all others, special training and practice. The judge, from his training and discipline, is more likely to give a proper
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