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The ornamental design for a wristwatch calculator, as shown and described. |
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FIG. 1 is a front perspective view of a wristwatch calculator showing my new design;
FIG. 2 is a top plan view thereof, the bottom being conventional.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Nov 12 1976 | Hewlett-Packard Company | (assignment on the face of the patent) | / |
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