Patents by Inventor Folke B. Nilsson

Folke B. Nilsson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • 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