Radial heatsinks were kinda more common in the old days, I remember ThermalTake having their orb series when they were more innovative than they are today. Though as far as I know the patent Zalman holds is about the looping heatpipe design which using 3 heatpipes in a loop to the base providing the same cooling surface area as like using 6 separate heatpipes in a radial fin array assembly.
Cryorigs design actually seems to use 6 separate heatpipes with curved ends matching their radial profile and their fin assembly probably works by sandwich press soldering 2 separate arrays per tower (4 total) like seen on the R1 Universal/Ultimate as this is how their so called Jet Fin Acceleration is mechanically designed and assembled in the R1.
I still have my Zalman 9900 Max, unfortunately their fastener design is poorly engineered as I had to replace them with due to them stripping the moment I apply the slightest torque to tighten them up on installation. And yes the whole mounting system is a disaster if you're trying to install it in a motherboard already installed in an enclousure. You're better off removing the board from the chassis to install it without much of the hassle.
I'm still waiting on the Z1, its probably the most interesting heatsink in a good while.