The mechanics are interesting.
The 50/1.4 is 37mm longer than the current 50/1.4.
The 85/1.8 is 45mm longer than the current 85/1.8.
That'll change how well they fit in various people's camera bags but I suppose this is what's required to add image stabilisation to each of these lenses.
Im not shure that "length of the lens" means the physical length of the real lens assembly - I think it is the length between front surface and the image plane. The values you have calculated are in the region of the flange-sensorplane-distance ...
I have made a simple overlay of the cut views of the current 1.4/50 and the proposed (in the patent) lens. Both scaled to the aperture which should be similar.
I do not see any dramatic difference between both - no IS elements, no retrofocus scheme - just small changes which allow to introduce additional lenses to correct aberrations. So it will not be a reincarnation of the Carl Zeiss 1.4 55mm ...