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The ornamental design for a vertical stepper stage apparatus, as shown and described. |
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FIG. 1 is a top plan view of the novel vertical stepper stage apparatus;
FIG. 2 is a right side elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a frontal (or rear) elevational view, the opposite view being a mirror image thereof;
FIG. 5 is a bottom plan view thereof; and,
FIG. 6 is a perspective view thereof.
Selzer, Robert A., Rauch, Franz
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