Patents by Inventor Miriam O. Tolfsen

Miriam O. Tolfsen 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: 3973343
    Abstract: A picture frame includes an outer glass or plastic enclosure and an inner mounting base or board made of a fibrous or porous material such as fiberboard, cork and the like, to facilitate the mounting of picture elements either by pressure or by pin fasteners thereon. In one embodiment, the frame includes an outer rectangular glass or transparent plastic panel, an intermediate panel of cork or fiberboard or other material and an end panel of a backing board or of glass or plastic which are held in assembly by screw bolts, which are secured at their ends by bolt heads which also engage on the picture frame supporting bracket. Various holders are associated with the fiberboard or mounting board which provide ornamental pin elements which may be used for holding the pictures in an oriented position. The frame may however be used without these as the pressure of the screw or bolt will hold pictures in place under the glass or transparent plastic.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: August 10, 1976
    Inventor: Miriam O. Tolfsen