Patents Assigned to Leson-Laboratorio de Engenharia Sonica Ltd.
  • Mid-range tweeter
    Patent number: D371367
    Type: Grant
    Filed: August 11, 1994
    Date of Patent: July 2, 1996
    Assignee: Leson-Laboratorio de Engenharia Sonica Ltd.
    Inventor: Helio T. Bittencourt