I think this might be what you're looking for(if the graphic loads).
Link to image if graphic doesn't load:
http://i67.tinypic.com/1zn039i.jpgAnything involving keywords innovation, invention, s curve should yield decent results and better information than I could provide..
BTW I wouldn't have a clue what the "S Curve" was if another poster on this forum hadn't written about it previously. Can't take credit for this one, but if you ever get the feeling its not worth it to type out a decent, informed, response just know that sometimes there actually are people reading who might learn something and gain from your knowledge.