How many actual RF lenses were traceable back to a patent?
I haven't read this patent, but the patents I have read (I read Japanese) are never for the lens formulae in the patent. Instead the patent is basically for a "recipe" to make a lens, and the lenses shown are simply examples of what you could do with that recipe. The patent might be say for a lens "recipe" whereby group 1 is net concave, group 2 is convex, group 3 accomplishes internal focus, group 4 is for image stabilization, group 5 is convex, group 6 is concave, with additional specifics on the lens group designs. Then they show how you can use this recipe to make a nice lens, but the patent isn't "for" that lens.