Stethoscope (24) Patents (Class D24/134)
  • Disposable stethoscope
    Patent number: D323033
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: January 7, 1992
    Inventor: Derek R. Allen
  • Stethoscope chestpiece
    Patent number: D323394
    Type: Grant
    Filed: July 28, 1989
    Date of Patent: January 21, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Jane W. Casto, Curtis A. Hostager
  • Binaural headpiece for a stethoscope
    Patent number: D335709
    Type: Grant
    Filed: May 31, 1991
    Date of Patent: May 18, 1993
    Inventor: Jae H. Choi