CUPS Purchased by Apple Inc. Jul 11, 2007
"CUPS is now owned by Apple, but the software and license remain the same."
http://www.cups.org/articles.php?L475+I0+T+M10+P1+Q

Article #180: Trademarks Last modified at 15:04 Jul 11, 2007
"Apple Inc. has trademarked the Common UNIX Printing System, CUPS, and CUPS logo."
http://www.cups.org/articles.php?L180+I0+T+M10+P1+Q