To take on an existing design or invention and changing it sufficiently to not infringe on copyright or patents. Ocassionally someone actually improves on a design for the better.
SJ: At long last I have made an iPhone
that does not drop calls unless you are left handed or sweaty.
BG: Thats pretty good but it's not exactly re-inventing the wheel is it?
SJ: No not really but it's slightly better than the last one and double the price.