^ Yeah, I meant Intamin. They were representing Schwarzkopf as a company. Zierer and BHS only stepped in after Herr Schwarzkopf's company closed its doors and did also build the coasters. That's why the likes of Olympia Looping and Lisebergbanan aren't technically products of Schwarzkopf company, but rather of Zierer/BHS, with Schwarzkopf 'only' as a designer of the ride. That's from what I can gather, I am open to any correction, though.
Your turn Ireeb.