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The ornamental design for a computer trackball, as shown and described. |
FIG. 1 is a rear isometric view of a computer trackball showing our new design;
FIG. 2 is a bottom isometric view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a right side elevational view thereof in the tilted orientation;
FIG. 7 is a rear elevational view thereof; and,
FIG. 8 is a front elevational view thereof.
The broken line drawing of an electrical cord in FIGS. 2 and 4 is for illustrative purposes only and forms no part of the claimed design.
Nelson, Michael D., Bradley, Paul, Yurchenco, James R., Paull, Mike M., Ashmun, Stuart, Garthwaite, Charlie, Cameron, Bridget, Stephan, Allan H., Fulton, Elinor J.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Mar 08 1991 | Microsoft Corporation | (assignment on the face of the patent) | / |
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