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The ornamental design for the glass block, as shown. |
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FIG. 1 is a top view of the glass block of the invention;
FIG. 2 is a front view of the glass block of FIG. 1;
FIG. 3 is a bottom view of the glass block of FIG. 1;
FIG. 4 is a first side view of the glass block of FIG. 1;
FIG. 5 is a back view of the glass block of FIG. 1; and,
FIG. 6 is a second side view of the glass block of FIG. 1.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jun 19 1992 | ALDRIDGE, PETER S | Pittsburgh Corning Corporation | ASSIGNMENT OF ASSIGNORS INTEREST | 006183 | /0308 | |
| Jun 25 1992 | Pittsburgh Corning Corporation | (assignment on the face of the patent) | / |
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