Level capable to measure minute inclination

Geometrical instruments – Indicator of direction of force traversing natural media – Level or plumb – terrestrial gravitation responsive

Reexamination Certificate

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C033S384000

Reexamination Certificate

active

06901671

ABSTRACT:
The present invention relates to a level. More particularly, the present invention relates to a right/left and vertical level that is capable of right/left and verticality/horizontality measurement at the same time, and is capable of exactly measuring an inclined angle and a minute inclination angle. Therefore, the verticality and horizontality of the right and left can be measured through one work and their inclined directions and angles can be simply and exactly measured. Further, a fine inclined angle (1° unit) of an object can be measured. It is thus possible to improve the efficiency of a worker in construction fields, shorten working hours, and thus improve the efficiency of the work.

REFERENCES:
patent: 2526493 (1950-10-01), McCoy
patent: 2586194 (1952-02-01), Wochner
patent: 2645030 (1953-07-01), Mahone
patent: 2767483 (1956-10-01), Sauer, Jr.
patent: 3030710 (1962-04-01), Fell
patent: 5177873 (1993-01-01), Tate
patent: 5806196 (1998-09-01), Gibbs et al.
patent: 6477781 (2002-11-01), Blatt

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