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21 Jun 2011, 5:19 am
Patent No. 6,752,435 entitled SYMMETRICAL COUPLER APPARATUS FOR USE WITH PRECAST CONCRETE SEGMENTAL CONSTRUCTION and owned by Felix Sorkin. [read post]
21 Jun 2011, 5:19 am
Patent No. 6,752,435 entitled SYMMETRICAL COUPLER APPARATUS FOR USE WITH PRECAST CONCRETE SEGMENTAL CONSTRUCTION and owned by Felix Sorkin. [read post]