Viewing Proceedings in Memory of Harry A. Blackmun (1999).Proceedings in Memory of Harry A. Blackmun (1999).Harry Andrew Blackmun served as Associate Justice of the United States Supreme Court from June 9, 1970 to August 3, 1994, when he retired. He died at age 90 on March 4, 1999. On October 27, 1999, a Memorial Proceeding was held for him in the Court. |