73313122
Jun 4, 1981
Jun 28, 1983
Precut Hardwood Logs that Lock Together to Form Structures without the Aid of Nails or Adhesives, Used Primarily to Construct Exterior Garden Structures and Enclosures Such as Tree-Rings, Retaining Walls, Fences, Sand Boxes, Tool Sheds and Patio Walls
Nonmetallic Building Materials