"In the United States, the shapes of typefaces are not eligible for copyright, though the shapes may be protected by design patent (although these are rarely applied for, the first US design patent ever awarded was for a typeface)." https://en.wikipedia.org/wiki/Intellectual_property_protecti...
Also from somebodynew: "A US federal court held that typeface designs cannot be copyrighted in Eltra Corp. v. Ringer in 1978. Federal regulations made this explicit in 37 CFR 202.1(e) in 1992. The government's explanation here [1] makes it explicit that typefaces are not subject to copyright protection, while fonts can be copyrighted as computer software." [1] https://cdn.loc.gov/copyright/history/mls/ML-393.pdf