A building panel particularly adapted for horizontal application. The panel presents inner and outer male connectors at the upper edge of the panel, and complimentary inner and outer female connectors at the lower edge of the panel. Gutter means is provided along the upper edge of the panel ...http://www.google.es/patents/US5749282?utm_source=gb-gplus-sharePatente US5749282 - Building panel with double interlock joint and internal gutter
Building panel with double interlock joint and internal gutter
