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The ornamental design for a step stool, as shown and described. |
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FIG. 1 is a right side elevational showing my new design the opposite side being a mirror image;
FIG. 2 is a bottom plan view;
FIG. 3 is a front elevational view;
FIG. 4 is a rear elevational view;
FIG. 5 is a top plan view; and
FIG. 6 is a top rear perspective view thereof.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Aug 21 1987 | DEWING, KENNETH M | Dewtek Corporation | ASSIGNMENT OF ASSIGNORS INTEREST | 004776 | /0064 | |
| Aug 27 1987 | Endurequest Corporation | (assignment on the face of the patent) | / | |||
| May 08 1991 | Dewtek Corporation | Endurequest Corporation | ASSIGNMENT OF ASSIGNORS INTEREST | 005711 | /0631 |
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