Claims (1)
Claim 1 (Independent)
The ornamental design for screw back, as shown and described.
Full Description
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FIG. 1 is a perspective view of screw back showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a right side view thereof; and,
FIG. 7 is a bottom plan view thereof.
Citations
This patent cites (5)
- US2882702
- USD278987
- USD281149
- USD359706
- USD363683