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The ornamental design for electronic keyboard musical instrument, as shown. |
FIG. 1 is a top perspective view of an electronic keyboard musical instrument showing a new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a rear elevation view thereof; and
FIG. 7 is a left side elevation view thereof.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Feb 01 1989 | MINE, IKURO | Yamaha Corporation | ASSIGNMENT OF ASSIGNORS INTEREST | 005040 | /0352 | |
Feb 09 1989 | Yamaha Corporation | (assignment on the face of the patent) | / |
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