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The ornamental design for a double block for boats, as shown. |
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FIG. 1 is a side view of the double block for boats;
FIG. 2 is a side view of the double block for boats, opposite to that shown in FIG. 1;
FIG. 3 is a view from below of the double block for boats;
FIG. 4 is a view from above of the double block for boats;
FIG. 5 is a front view of the double block for boats.
Nava, Riccardo, Ubertazzi, Alessandro, Soffientini, Riccardo, Romani, Giorgio
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Apr 11 1977 | Nemo S.p.A. of Zona Industriale | (assignment on the face of the patent) | / |
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