American was a jazz guitarist, born July 17, 1921 in Minot, ND, died in 1992 in Bakersfield, CA. Mary started out in the Winifred McDonnell Trio in 1938. She married trumpeter, Ralf Scaffidi in 1942 and had her own radio program on NBC in 1948. In 1967, she and her family moved to Bakerfield, CA and started the Rosac Electronics Company which then morphed into the Osborne Guitar Company and then into Osborne Sound Laboratories. The company manufactured guitars, basses, and amplifiers until it folded in 1980. During her career as a guitarist, she worked with Coleman Hawkins, Stuff Smith, and The Beryl Booker Trio as well as her own group, The Mary Osborne Trio.