Professors Field, Nard, and Duffy submitted an amicus brief to the Supreme Court in the case of Dickinson v. Zurko. In Dickinson, the Federal Circuit concluded that the Patent and Trademark Office's factual findings must be reviewed under a clearly erroneous standard and not the substantial evidence standard set out in the Administrative Procedure Act. However, the amicus brief asserted that the PTO is subject to the standards of judicial review set forth in the APA.
Thomas G. Field, Craig Allen Nard, and John F. Duffy,
Dickinson v Zurko: An Amicus Brief,
4 Marq. Intellectual Property L. Rev. 49
Available at: https://scholarship.law.marquette.edu/iplr/vol4/iss1/3