For this particular implementation there shouldn't be since it is quite literally a disassembly of a product from the 1980s that was then translated to C. Howev

For this particular implementation there shouldn't be since it is quite literally a disassembly of a product from the 1980s that was then translated to C. However, none of that matters as we're talking about copyright and the literal copying of the protectable expressions that constitute that work, not patents.