Patents by Inventor Margherita Sanfilippo

Margherita Sanfilippo 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).

  • Patent number: 4222302
    Abstract: A training attachment for a stringed instrument which is fixed in the F holes to extend across the strings and serve as a guide for assuring the correct use of the bow.
    Type: Grant
    Filed: August 2, 1979
    Date of Patent: September 16, 1980
    Inventor: Margherita Sanfilippo