The ornamental design for an electronic keyboard musical instrument, as shown.
FIG. 1 is a top view of an electronic keyboard musical instrument;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a bottom view thereof;
FIG. 5 is a left-side view thereof; and,
FIG. 6 is a right-side view thereof.
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| D814555, | Feb 11 2016 | POOLE, CHRISTOPHER | Colored piano mat |
| D826315, | Sep 26 2017 | Yamaha Corporation | Electronic keyboard |
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Aug 14 2000 | Yamaha Corporation | (assignment on the face of the patent) | / |
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