I've had both a regular set of 9 inch and a tiered set of the "checkerboard" cake pans (12", 9" & 6") for about forty years and used them often when I was catering. The latter a professional set that is no longer manufactured.
I just thought this was a different and clever idea without needing specialty pans. I've got deep cake pans from 3 inch to 18 inch so could easily just bake the "rings" using smaller pans inside the larger ones. I used to do this to make hollow cake molds to be filled with something else. (The inner pans have to be weighted.)