What font is banned by the US court of Appeals?

In recent developments within the realm of digital forensics and intellectual property, the US Court of Appeals has issued a notable ruling concerning the use of certain fonts in legal documents. Could you elaborate on the specific font that has been banned by the court, and perhaps provide some context on why such a decision was made? It's intriguing to learn how even seemingly minor details like font choice can have significant legal implications, and I'm curious to understand the nuances behind this particular case.