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The ornamental design of a mortar mixer, substantially as shown. |
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FIG. 1 is a perspective partly front elevational and partly side elevational view of a mortar mixer showing the new design;
FIG. 2 is a side elevational view of the mortar mixer;
FIG. 3 is another side elevational view of the mortar mixer;
FIG. 4 is a rear elevational view of the mortar mixer;
FIG. 5 is a front elevational view of the mortar mixer;
FIG. 6 is a top plan view of the mortar mixer; and
FIG. 7 is a bottom plan view of the mortar mixer.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Sep 29 1980 | BAUM ROLF | Mathis System-Technik GmbH | ASSIGNMENT OF ASSIGNORS INTEREST | 003821 | /0053 | |
| Oct 06 1980 | Mathis System-Technik GmbH | (assignment on the face of the patent) | / | |||
| Feb 15 1983 | MATHIS SYSTEM - TECHNIK GMBH | M-TEC MATHIS TECHNIK GMBH | CHANGE OF NAME SEE DOCUMENT FOR DETAILS NOVEMBER 3, 1989 | 005175 | /0788 |
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