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The ornamental design for a computer trackball, as shown and described. |
FIG. 1 is a top perspective view of a computer trackball showing our new design;
FIG. 2 is a side perspective view thereof;
FIG. 3 is a right side elevational view thereof on an enlarged scale;
FIG. 4 is a bottom plan view thereof; and,
FIG. 5 is a rear elevational view thereof.
The partial broken line drawings of a cord in FIG. 1 and the keyboard in FIG. 2 are for illustrative purposes only and form no part of the claimed design.
Bradley, Paul, Yurchenco, James R., Ashmun, Stuart, Garthwaite, Charlie, Cameron, Bridget, Fulton, Elinor J.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Dec 23 1992 | Microsoft Corporation | (assignment on the face of the patent) | / |
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