I claim the ornamental design for a keyboard, as shown and described.
FIG. 1 is a front perspective view of a keyboard; and,
FIG. 2 front elevational view of a keyboard.
The broken lines shown immediately surrounding the indicia of the keyboard represent the bounds of the claimed design, and the remaining broken line disclosure represents portions of the keyboard and forms no part of the claimed design thereof.
CORRECTIVE ASSIGNMENT TO CORRECT THE ASSIGNEE FROM RESEARCH IN MOTION LIMITED TO 2012244 ONTARIO INC PREVIOUSLY RECORDED ON REEL 024056 FRAME 0466 ASSIGNOR S HEREBY CONFIRMS THE ATTACHED ASSIGNMENT SUPPORTS THIS CORRECTION