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The ornamental design for a sight glass, as shown and described.
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FIG. 1 is a front perspective view of sight glass showing my new design, the bottom is a mirror image of the top;
FIG. 2 is a front elevational view thereof, the undisclosed rear is unornamented and not part of the claimed design; and,
FIG. 3 is a right side elevational view thereof, the left side is a mirror image.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jul 26 2005 | SPRAGUE, CURTIS | Branham Corporation | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 016943 | /0943 | |
| Jul 27 2005 | Branham Corporation | (assignment on the face of the patent) | / |
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