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The ornamental design for a water purification unit, as shown and described. |
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FIG. 1 is a perspective view of my design for a water purification unit;
FIG. 2 is a front view thereof;
FIG. 3 is a back view of the system;
FIG. 4 is a side view, the opposite side being a mirror image thereof;
FIG. 5 is a bottom view thereof; and,
FIG. 6 is a top view of the inventive design.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Feb 21 1992 | H. T. Manufacturing, Inc. | (assignment on the face of the patent) | / |
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