Task: songer_usc1sect

What follows is an opinion from a United States Court of Appeals.
Your task is to identify the number of the section from the title of the most frequently cited title of the U.S. Code in the headnotes to this case, that is, title 35. In case of ties, code the first to be cited. The section number has up to four digits and follows "USC" or "USCA".

PER CURIAM.
This is a suit under R.S. § 4915, 35 U.S. C.A. § 63, to obtain a patent on a snap-on cover for a container. In our opinion the finding of the trial court that the claims do not show invention over the prior art is consistent with the evidence. The judgment dismissing the complaint is therefore affirmed. Abbott v. Coe, 71 App.D.C. 195, 109 F.2d 449.

Question: What is the number of the section from the title of the most frequently cited title of the U.S. Code in the headnotes to this case, that is, title 35? Answer with a number.
Answer:

Answer: 63