ใครแต่งงานกับAnna Case?

Anna Case (October 29, 1887 - January 7, 1984) was an American operatic lyric soprano. She recorded with Thomas Alva Edison, who used her voice extensively in "tone tests" of whether a live audience could tell the difference between the actual singer and a recording. In addition to recordings for Edison Records on both phonograph cylinder and Diamond Disc, Case recorded for Victor and Columbia Records, and made sound film for Vitaphone.

Clarence Hungerford Mackay (; April 17, 1874 – November 12, 1938) was an American financier. He was chairman of the board of the Postal Telegraph and Cable Corporation and president of the Mackay Radio and Telegraph Company.