Means for and method of making a cast structural fire proof pane

Metal cased refractory and method of making same

Metal encased refractory brick

Metal-faced panels having water tight joints

Method and an external plating arrangement for sealing off the c

Methods and apparatus for fabricating plastic block panels

Modified dovetail joint

Modular block structures for breakwaters, harbor dams and the li

Modular building block

Nesting modular elements, and their method of assembly

Overlapping tile

Panel for a composite surface and a method of assembling same

Plastic panel, in particular for lining concrete components

Precast concrete structural unit and composite wall structure

Prefabricated concrete retaining wall

Quick stack building block

Resin building

Retaining block

Reversible panel arrangement

Self-arcing tank segments