Originally Posted by
Andrew R Stewart
With it's mating single side plated chain. I saw that patent blurb too. Andy
Those patents are from 1999 so Shimano has had plenty of time to do something with them. Shimano never commercialized the ideas and, after they expire in 2019, it's very likely neither will anyone else.
A Google search turned up this web site which had me wondering for a few minutes until I saw the date:
https://factoryjackson.com/2016/04/0...urai-unveiled/