Claims (1)
Claim 1 (Independent)
The ornamental design for a portable keyboard, as shown and described.
Full Description
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FIG. 1 is a top, front and side perspective view of a portable keyboard;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a rear elevation view thereof;
FIG. 6 is a left elevation view thereof; and,
FIG. 7 is a right elevation view thereof.
The portions of the drawings shown in broken lines, including depictions of the keys illustrate environment only and form no part of the claimed design.