Thanks everyone for the thoughtful discussion. As far as what the lens actually is versus what the patent calls for I am not sure, I guess the only way to really tell would be to take apart the lens and measure diameters, thicknesses, distances, and radii.
All I know is the lens is a great performer, took this image of M31 Andromeda Galaxy with it on 08/19. Chromatic abberation is very low, less than a lot of ED refractors I have owned.
Image is 1hr 30 min total integration, 3 min exposures unguided with Canon 5D Mark II full frame DSLR.