CEMENT *patents keeps changing hands?
https://www.businesswire.com/news/home/20200128005556/en/Hoffmann-Green-Cement-Technologies-Announces-That-It-Has-Been-Granted-a-Patent-for-Its-H-P2A-Technology-in-the-United-States
Yes.
And it has 'transferred' from Hand to Hand thru the many centuries but is an Ancient mixture that is highly protected?
The same Stucco mixture that couldn't be replicated to do Refurbish work in Restoration projects from Germany/Italy/Russia?
And this is what has BUILT all the Pyramids?
>https://www.irjet.net/archives/V6/i5/IRJET-V6I5514.pdf