百聞は一見にしかず

Appellate Practice: Working Models for the Court (PatentlyO)
Farrago v. Rawlings Sporting Goods (Fed. Cir. 2009)

Farrago submitted a sample of the accused product to the appellate court so that the judges and clerks could examine the product prior to oral arguments.

During oral arguments, the court thanked Farrago's attorney - noting that the sample "was very helpful." Of course, the court needed only 24 hours to release its opinion against Farrago.