https://www.crowdspring.com/blog/font-law-licensing/
> Generally, copyright law in the U.S. does not protect typefaces.
> Fonts may be protected as long as the font qualifies as computer software or a program (and in fact, most fonts are programs or software).
> Bitmapped fonts are considered to be computerized representations of a typeface (and are not protected by copyright law).
> On the other hand, scalable fonts (because they are incorporated as part of a program or software) are protected by copyright.