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The ornamental design for a keyboard, as shown. |
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FIG. 1 is a top view of a keyboard showing my new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a bottom view thereof.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jan 16 1981 | ENDT EVERT | Thomson-CSF | ASSIGNMENT OF ASSIGNORS INTEREST | 003855 | /0181 | |
| Jan 21 1981 | Thomson-CSF | (assignment on the face of the patent) | / |
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