The exclusive Enfield telescopic forks

The Enfield forks were "exclusive" in the sense that they were patented and therefore there were no other forks out there just like them. But telescopic forks had been used, say by BMW, since the 1930's. What might have been the argument used by Royal Enfield to get the patent office to issue a patent on its forks? Were they so radically different from BMW's? I heard that the Enfield forks had two-way damping, whereas for instance BSA would still have one-way damping almost one decade later. Perhaps a reader can give a more precise answer? Speculations are welcome!