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The ornamental design for a portable keyboard, as shown.
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FIG. 1 is a front right perspective view of a portable keyboard showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof; and,
FIG. 8 is a closed view thereof.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Jun 30 2001 | CHANG, CHENG-CHUNG | CHAIN TAY TECHNOLOGY CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 012000 | /0349 | |
Jul 17 2001 | Chain Tay Technology Co., Ltd. | (assignment on the face of the patent) | / |
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