Credit for the creation of the UBRR would go to SGM Ed Bugarin and a few teammates. See link below for interview.
http://www.itstactical.com/centcom/i...or-ed-bugarin/
He still has the original piece of paper on which he and his teammates wrote down the evolutions. One of the most generous and humble men of his calibre I've ever met, and a continual wealth of knowledge.