The ornamental design for a grindingmachine, as shown and described.
The file of this patent contains at least one drawing/photograph executed in color. Copies of this patent with color drawing(s)/photograph(s) will be provided by the Office upon request and payment of the necessary fee.
Fig. 1.1 is a front, left side perspective view of a grinding device in accordance with the new design;
Fig. 1.2 is a front, right side perspective view thereof;
Fig. 1.3 is a rear, right side perspective view thereof;
Fig. 1.4 is a rear, left side perspective view thereof;
Fig. 1.5 is a right side elevational view thereof;