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(11) | EP 2 138 645 A3 |
(12) | EUROPEAN PATENT APPLICATION |
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(54) | Building brick |
(57) The building brick (1) has a prismatic shape and comprises at least a first groove
(13) obtained on a first horizontal surface (5 or 6) and at least a first projection
(14) obtained on a second horizontal surface (6 or 5) and at least a second projection
(11) obtained on a first vertical side surface (3) and at least a second groove (12)
obtained on a second vertical side surface (4).
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