Patents by Inventor Pieter Daniel Swart

Pieter Daniel Swart 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).

  • Interlocking construction block
    Patent number: 4719737
    Abstract: An interlocking construction block has a first, two second and two third parts each having major faces lying in parallel planes. The block is generally V-shaped when viewed normally to the parallel planes and the height of the third parts is only one half of that of the first and second parts, enabling the block to be interlocked neatly with other similar blocks to form a wide variety of structures.
    Type: Grant
    Filed: February 19, 1987
    Date of Patent: January 19, 1988
    Assignee: Sylsands Securities (Properietary) Limited
    Inventor: Pieter Daniel Swart