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			 The ornamental design for a writing board, as shown and described.  | 
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FIG. 1 is a perspective view of a writing board, showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a side elevational view, the opposite side being a mirror image thereof;
FIG. 4 is an end elevational view;
FIG. 5 is an end elevational view of the end opposite that shown in FIG. 4; and
FIG. 6 is a bottom plan view thereof.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc | 
| Aug 12 1987 | GREENSPAHN, RANDY S | VERTIFLEX COMPANY, A CORP OF IL | ASSIGNMENT OF ASSIGNORS INTEREST | 004817 | /0688 | |
| Nov 02 1987 | Vertiflex Company | (assignment on the face of the patent) | / | 
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