I believe that Dr. Ross has passed, but I don't know any details--sorry if I created a wrong impression. As per BB King--my recollection is that his signature lick was first used by T-Bone--the Chuck Berry lick was earlier used by T-Bone as well--Walker was a lot like Lonnie Johnson in that he was an inventive, progressive player, and his records were widely listened and drawn on by other musicians, many of whom built their styles around what they picked up--