Patents by Inventor Martha S. Wahl

Martha S. Wahl 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).

  • Educational blocks
    Patent number: 4317653
    Abstract: Sets of educational blocks are described wherein special volumetric relationships are combined with visually distinctive geometric shapes. In one set of blocks a common cube is cut into distinctive segments along a single slice to form particular polygons. In another set of blocks a common cube is cut in a manner to provide polyhedra of distinctive appearance with related outer segments used to fill out the common cube. Particular volumetric relationships between the polyhedra and their related segments are described.
    Type: Grant
    Filed: January 21, 1980
    Date of Patent: March 2, 1982
    Inventor: Martha S. Wahl
  • Educational blocks
    Patent number: 4317654
    Abstract: Sets of educational blocks are described wherein special volumetric relationships are combined with visually distinctive geometric shapes. In one set of blocks a common cube is cut into distinctive segments along a single slice to form particular polygons. In another set of blocks a common cube is cut in a manner to provide polyhedra of distinctive appearance with related outer segments used to fill out the common cube. Particular volumetric relationships between the polyhedra and their related segments are described.
    Type: Grant
    Filed: January 21, 1980
    Date of Patent: March 2, 1982
    Inventor: Martha S. Wahl