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The ornamental design for a levelling device, as shown and described. |
FIG. 1 is a perspective view of a levelling device showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a right side elevational view thereof; and,
FIG. 7 is a left side elevational view thereof.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Aug 13 1979 | Martronics Corp. | (assignment on the face of the patent) | / | |||
Mar 28 1982 | LECTRA LTD | ENERGY SAVERS ASSOCIATES, INC | SECURITY INTEREST SEE DOCUMENT FOR DETAILS | 003967 | /0674 |
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