Patents by Inventor Mildred Black

Mildred Black 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).

  • Square dabber
    Patent number: D326118
    Type: Grant
    Filed: July 25, 1989
    Date of Patent: May 12, 1992
    Inventor: Mildred Black