Levelling device

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Description

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.

Referenced Cited
U.S. Patent Documents
2584917 February 1952 Powell
2789362 April 1957 Maroth
3233235 February 1966 Wright
3584387 June 1971 Sturm
3861052 January 1975 Siegfried
4182046 January 8, 1980 Ludlow
4253242 March 3, 1981 McInerney
Patent History
Patent number: D261996
Type: Grant
Filed: Aug 13, 1979
Date of Patent: Nov 24, 1981
Assignee: Martronics Corp. (Morton Grove, IL)
Inventor: William F. Barton (Arlington Heights, IL)
Primary Examiner: Nelson C. Holtje
Attorney: Robert E. Browne
Application Number: 6/65,754
Classifications
Current U.S. Class: Spirit Level (D10/69)
International Classification: D1004;