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The ornamental design for a writing instrument cap, as shown and described. |
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FIG. 1 is a top, left front perspective view of a writing instrument cap showing our new design;
FIG. 2 is a left side elevational view, the right side being a mirror image thereof;
FIG. 3 is a front elevational view;
FIG. 4 is a bottom plan view; and,
FIG. 5 is a top plan view thereof.
Katami, Kazunori, Suzuki, Kazuhiko
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jun 30 1992 | Tombow Pencil Co., Ltd. | (assignment on the face of the patent) | / |
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