Moreover a lot of those patents are old and refer to obsolete manufacturing techniques like die casting. Even the foam and sheet patent you are mentioning are just shots into the dark without any feasibility.
What remains are the 15 patents relating to injection molding. Well, and here lies the crux, I wouldn`t bet my money on the success of this system, as there are other more advanced techniques like Ohmic Heating and the recently revealed bonding technique, and as the business plan is totally vague for how they want to receive significant revenue out of their Engel strategy.
In Steipp words: "there is some relationship with Engel, but I cannot comment on that"
Cause he cannot, because everything is still in abeyance! If it were something serious, we would have already heard something from Engel and their alleged "quoted" machinery.