Apparatus for dimensionally uniform building construction using interlocking connectors. In the preferred embodiment, the apparatus comprises a system of building blocks, each block having a top, a bottom, an interior face, an exterior face, and two end faces. Each block is substantially dimensionally...http://www.google.es/patents/US5901521?utm_source=gb-gplus-sharePatente US5901521 - Apparatus for dimensionally uniform building construction using interlocking connectors
Apparatus for dimensionally uniform building construction using interlocking ...
