Laser level with improved leveling adjustability

Geometrical instruments – Straight-line light ray type – Level

Reexamination Certificate

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Reexamination Certificate

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11353892

ABSTRACT:
A laser level includes a level-adjusting device and a laser transmitter device mounted on the level-adjusting device. The level-adjusting device includes a horizontal flat board movable by a plurality of motor modules to a desired condition, a cross rotatable circle including an outer circle rotatable about a first rotation axis and a concentric inner circle rotatable about a second rotation axis perpendicular to the first rotation axis, and a connecting post connecting the horizontal flat board to the cross rotatable circle and supporting the laser transmitter thereon.

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patent: 6195901 (2001-03-01), Falb
patent: RE37318 (2001-08-01), Porter
patent: 6906310 (2005-06-01), Jiang et al.
patent: 2004/0172836 (2004-09-01), Ng et al.
patent: 2005/0184205 (2005-08-01), Fang

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