Abstract: A nested pair of perforated containers floats partially submerged in seawater, tethered to a fixed object such as a dock or pier. The inner container is partially filled with oyster spat, closed and laid within the outer container which is then closed and secured. The immature oysters are protected from predators and immersed in the upper 24 inches of seawater where optimum growing conditions exist. Floatation attached to the outer container maintains the top at the water's surface and replaceable filter material around the outside periphery absorbs harmful oils and chemicals. Periodically the inner container is removed, opened and the grown oysters are harvested or dumped onto an oyster bed and the process is repeated.

Abstract: Interlocking building blocks are disclosed which are designed to be used to form a lintel over a doorway, window or other opening in a building structure. The building blocks of the present invention are designed to interface with generally rectangular cubic building blocks which are used to form walls of a building. The inventive blocks include passageways therethrough allowing receipt of reinforcing rebar steel and interconnect to form a smooth consistent and effective structure.