// Copyright (C) 1991 - 1999 Rational Software Corporation
I think it actually originated in 2002 and those are junk left over from the use of Rational Rose code generation. Revision history only goes back to 2007.
Perhaps a former programmer deleted the revision history when they were about to move into a management role at your organization. I once stumbled upon a manager's name in the history of a 1970's Cobol program which had a goto statement every 5 lines, and it usually took half a day to make a simple change. All of the other similar-looking programs had had their history purged. When I showed the history notation to the manager, the look on his face wasn't nostalgia but fear.