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			 The ornamental design for "control unit for irrigation systems," as shown and described.                                                              | 
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FIG. 1 is a perspective view of my new control unit;
FIG. 2 is a perspective view of my new control unit with a key protecting cover in open position;
FIG. 3 is a top view of my control unit;
FIG. 4 is a lateral view of the control unit of FIG. 1;
FIG. 5 is a front view of the control unit of FIG. 1;
FIG. 6 is a rear view of the control unit of FIG. 1; and,
FIG. 7 is a bottom view of the control unit of FIG. 1.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc | 
| Jun 27 1997 | ROMAN, GIANFRANCO | CLABER S P A | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 008640 | /0064 | |
| Jul 10 1997 | Claber S.p.A. | (assignment on the face of the patent) | / | 
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