[dmerfield]

Per Ch 37, Sec. 202.1(e) of the Code of Federal Regulations, typefaces cannot be copyrighted in the United States:

https://www.bitlaw.com/source/37cfr/202_1.html

Note that although the design of the typeface is not copyrightable, the computer programs which generate typefaces (‘fonts’) contain elements which are:

https://www.copyright.gov/history/mls/ML-443.pdf

[mark-r]

While they may not be copyrightable, you can get a design patent: https://en.wikipedia.org/wiki/Intellectual_property_protecti.... I've read that Adobe and Microsoft have both protected some fonts this way.