Patents by Inventor Bror Anderson

Bror Anderson 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).

  • Dual purpose stencil-forming sheet containing a red pigment
    Patent number: 5149577
    Abstract: A dual purpose stencil-forming sheet is provided comprising an ink-pervious fibrous tissue base having an ink-impervious impregnant therethrough, which impregnant is relatively non-bleeding and contains a red pigment. In a composite where the stencil-forming sheet is in contact with a white or pastel underlying backing sheet, the striking of a key or pin onto the stencil-forming sheet through a black inked ribbon simultaneously cuts the stencil, leaves a black marking on the cut stencil and leaves a red marking on the white or pastel backing sheet.
    Type: Grant
    Filed: January 7, 1991
    Date of Patent: September 22, 1992
    Assignee: Mallace Industries Corporation
    Inventors: Wei-Min Chang, Bror Anderson