The three previous known editions of the Birth of  New Technology ( 1991, 1994 and 1995) do show a few differences such a the
patents approved lists being updated and as well as the buggy photos as he made improvements and changes. But once he finished a memo
he didn't go back and change too much. So I suspect the added pages were never widely published  or are an addendum or part of proof
for the next  planned edition which given the 1997 date probably didn't  happen.