Following the death of Knorr in 1977 , subsequent presidents of the Watch Tower Society have been Frederick W. Franz ( June 1977 - December 1992 ) ; Milton G. Henschel ( December 1992 - October 2000 ) and Don A. Adams ( October 2000 - ) .
Knorr died in 1977 and since then the presidents have been Frederick W. Franz , Milton G. Henschel and Don A. Adams .