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The ornamental design for sight glass, as shown and described. |
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FIG. 1 is a perspective view of the sight glass of my new design;
FIG. 2 is a front elevational view thereof, the rear elevational view is a mirror image thereof;
FIG. 3 is a side elevational view of the left side thereof;
FIG. 4 is a side elevational view of the right side thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a perspective view of a first modification of the sight glass of my new design;
FIG. 8 is a front elevational view of FIG. 7, the rear elevational view is a mirror image thereof;
FIG. 9 is a side elevational view of the left side of FIG. 7;
FIG. 10 is a side elevational view of the right side of FIG. 7;
FIG. 11 is a top plan view of FIG. 7; and,
FIG. 12 is a bottom plan view of FIG. 7.
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| D276731, | Jun 06 1983 | Thermostat magnifier | |
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| D423538, | Mar 25 1999 | Sight glass |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Date | Maintenance Fee Events |
| Date | Maintenance Schedule |