The present invention provides an interlocking paving block capable of accepting an internal lamp and a pavement of interlocking illuminated paving blocks. In one embodiment, the interlocking paving block has a main body bent from 14 gauge aluminum sheet metal to form upper and lower flanges for attaching...http://www.google.fr/patents/US6027280?utm_source=gb-gplus-shareBrevet US6027280 - Interlocking paving block with interior illumination capability
Interlocking paving block with interior illumination capability
