The README file includes the following notices:

   Changes since version 1.2 (c) 1998-2000 Eddie Kohler, under the
   same redistribution copyright as I. Lee Hetherington's. See below
   for I. Lee Hetherington's original README from 1992, updated
   slightly for today's t1utils.

   Eddie Kohler
   eddietwo@lcs.mit.edu

   Copyright (c) 1992 by I. Lee Hetherington, all rights reserved.

   Permission is hereby granted to use, modify, and distribute this
   program for any purpose provided this copyright notice and the one
   below remain intact.

   Note that these tools should not be used to illegally copy type-1
   font programs.  Typeface design is an intricate art that should be
   rewarded.

   I. Lee Hetherington
   ilh@lcs.mit.edu