Patents Assigned to Almqvist & Wiksell Laromedel AB
  • Music teaching aid
    Patent number: D247119
    Type: Grant
    Filed: March 31, 1976
    Date of Patent: January 31, 1978
    Assignee: Almqvist & Wiksell Laromedel AB
    Inventors: Folke B. Nilsson, Bengt Erik Lindahl