Martine Shoben is a man who designed many fashion tools including ruler, tapes and an author of many pattern cutting books. http://shobenfashionmedia.com/
I met him to have a chat about my ideas of developing tools and he was very helpful. I had an intention to make my tool bag to fit one of his rulers but it was too big. I might ask him to design one that fits my bag. He mentioned collaboration with me so one day it may happen?