It does if your proprietary API is the industry standard. Everything Microsoft puts out is both industry standard and proprietary. So is everything TSMC puts ou

It does if your proprietary API is the industry standard. Everything Microsoft puts out is both industry standard and proprietary. So is everything TSMC puts out (their processes). Most of the interconnects in any computer system as well. I actually bought a legal copy of the SATA standard, for $30ish.